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Finding the Fourth Proportional to 18,393.92, 25,381.54 and 10,839.76

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Solution

The fourth proportional to 18,393.92, 25,381.54 and 10,839.76 is: 14,957.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,393.92 : 25,381.54 = 10,839.76 : x
  2. Step 2: Convert to fraction form
    18,393.92/25,381.54 = 10,839.76/x
  3. Step 3: Cross multiply
    18,393.92x = 25,381.54 × 10,839.76
  4. Step 4: Simplify right side
    18,393.92x = 275,129,802.03
  5. Step 5: Solve for x
    x = 275,129,802.03/18,393.92
  6. Step 6: Final answer
    x = 14,957.65

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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.