Home / 28,129.76-38,817.80-15,382.60

Finding the Fourth Proportional to 28,129.76, 38,817.80 and 15,382.60

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Solution

The fourth proportional to 28,129.76, 38,817.80 and 15,382.60 is: 21,227.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.76 : 38,817.80 = 15,382.60 : x
  2. Step 2: Convert to fraction form
    28,129.76/38,817.80 = 15,382.60/x
  3. Step 3: Cross multiply
    28,129.76x = 38,817.80 × 15,382.60
  4. Step 4: Simplify right side
    28,129.76x = 597,118,690.28
  5. Step 5: Solve for x
    x = 597,118,690.28/28,129.76
  6. Step 6: Final answer
    x = 21,227.29

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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.