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Finding the Fourth Proportional to 28,058.92, 38,720.90 and 15,960.71

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Solution

The fourth proportional to 28,058.92, 38,720.90 and 15,960.71 is: 22,025.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,058.92 : 38,720.90 = 15,960.71 : x
  2. Step 2: Convert to fraction form
    28,058.92/38,720.90 = 15,960.71/x
  3. Step 3: Cross multiply
    28,058.92x = 38,720.90 × 15,960.71
  4. Step 4: Simplify right side
    28,058.92x = 618,013,192.54
  5. Step 5: Solve for x
    x = 618,013,192.54/28,058.92
  6. Step 6: Final answer
    x = 22,025.55

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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.