Home / 38,915.88-53,704.98-21,920.76

Finding the Fourth Proportional to 38,915.88, 53,704.98 and 21,920.76

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Solution

The fourth proportional to 38,915.88, 53,704.98 and 21,920.76 is: 30,251.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,915.88 : 53,704.98 = 21,920.76 : x
  2. Step 2: Convert to fraction form
    38,915.88/53,704.98 = 21,920.76/x
  3. Step 3: Cross multiply
    38,915.88x = 53,704.98 × 21,920.76
  4. Step 4: Simplify right side
    38,915.88x = 1,177,253,977.38
  5. Step 5: Solve for x
    x = 1,177,253,977.38/38,915.88
  6. Step 6: Final answer
    x = 30,251.25

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Double 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.