Home / 28,086.77-38,759.49-15,511.25

Finding the Fourth Proportional to 28,086.77, 38,759.49 and 15,511.25

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Solution

The fourth proportional to 28,086.77, 38,759.49 and 15,511.25 is: 21,405.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,086.77 : 38,759.49 = 15,511.25 : x
  2. Step 2: Convert to fraction form
    28,086.77/38,759.49 = 15,511.25/x
  3. Step 3: Cross multiply
    28,086.77x = 38,759.49 × 15,511.25
  4. Step 4: Simplify right side
    28,086.77x = 601,208,139.26
  5. Step 5: Solve for x
    x = 601,208,139.26/28,086.77
  6. Step 6: Final answer
    x = 21,405.39

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Find fourth proportional to 14,043.39, 19,379.75 and 7,755.63
Half scale
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Double scale
Find fourth proportional to 28,087.77, 38,760.87 and 15,512.25
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.