Home / 20,337.89-28,088.24-13,981.28

Finding the Fourth Proportional to 20,337.89, 28,088.24 and 13,981.28

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Solution

The fourth proportional to 20,337.89, 28,088.24 and 13,981.28 is: 19,309.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,337.89 : 28,088.24 = 13,981.28 : x
  2. Step 2: Convert to fraction form
    20,337.89/28,088.24 = 13,981.28/x
  3. Step 3: Cross multiply
    20,337.89x = 28,088.24 × 13,981.28
  4. Step 4: Simplify right side
    20,337.89x = 392,709,337.80
  5. Step 5: Solve for x
    x = 392,709,337.80/20,337.89
  6. Step 6: Final answer
    x = 19,309.25

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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.