Home / 28,775.38-39,721.17-22,489.78

Finding the Fourth Proportional to 28,775.38, 39,721.17 and 22,489.78

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Solution

The fourth proportional to 28,775.38, 39,721.17 and 22,489.78 is: 31,044.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,775.38 : 39,721.17 = 22,489.78 : x
  2. Step 2: Convert to fraction form
    28,775.38/39,721.17 = 22,489.78/x
  3. Step 3: Cross multiply
    28,775.38x = 39,721.17 × 22,489.78
  4. Step 4: Simplify right side
    28,775.38x = 893,320,374.64
  5. Step 5: Solve for x
    x = 893,320,374.64/28,775.38
  6. Step 6: Final answer
    x = 31,044.61

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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.