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Finding the Fourth Proportional to 28,737.71, 39,645.02 and 20,767.31

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Solution

The fourth proportional to 28,737.71, 39,645.02 and 20,767.31 is: 28,649.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,737.71 : 39,645.02 = 20,767.31 : x
  2. Step 2: Convert to fraction form
    28,737.71/39,645.02 = 20,767.31/x
  3. Step 3: Cross multiply
    28,737.71x = 39,645.02 × 20,767.31
  4. Step 4: Simplify right side
    28,737.71x = 823,320,316.46
  5. Step 5: Solve for x
    x = 823,320,316.46/28,737.71
  6. Step 6: Final answer
    x = 28,649.48

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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.