Home / 28,086.56-38,759.44-15,511.20

Finding the Fourth Proportional to 28,086.56, 38,759.44 and 15,511.20

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Solution

The fourth proportional to 28,086.56, 38,759.44 and 15,511.20 is: 21,405.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,086.56 : 38,759.44 = 15,511.20 : x
  2. Step 2: Convert to fraction form
    28,086.56/38,759.44 = 15,511.20/x
  3. Step 3: Cross multiply
    28,086.56x = 38,759.44 × 15,511.20
  4. Step 4: Simplify right side
    28,086.56x = 601,205,425.73
  5. Step 5: Solve for x
    x = 601,205,425.73/28,086.56
  6. Step 6: Final answer
    x = 21,405.45

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Half scale
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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.