Home / 38,715.86-53,431.94-21,724.70

Finding the Fourth Proportional to 38,715.86, 53,431.94 and 21,724.70

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Solution

The fourth proportional to 38,715.86, 53,431.94 and 21,724.70 is: 29,982.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,715.86 : 53,431.94 = 21,724.70 : x
  2. Step 2: Convert to fraction form
    38,715.86/53,431.94 = 21,724.70/x
  3. Step 3: Cross multiply
    38,715.86x = 53,431.94 × 21,724.70
  4. Step 4: Simplify right side
    38,715.86x = 1,160,792,654.07
  5. Step 5: Solve for x
    x = 1,160,792,654.07/38,715.86
  6. Step 6: Final answer
    x = 29,982.35

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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.