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Finding the Fourth Proportional to 22,381.71, 30,873.87 and 13,424.01

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Solution

The fourth proportional to 22,381.71, 30,873.87 and 13,424.01 is: 18,517.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,381.71 : 30,873.87 = 13,424.01 : x
  2. Step 2: Convert to fraction form
    22,381.71/30,873.87 = 13,424.01/x
  3. Step 3: Cross multiply
    22,381.71x = 30,873.87 × 13,424.01
  4. Step 4: Simplify right side
    22,381.71x = 414,451,139.62
  5. Step 5: Solve for x
    x = 414,451,139.62/22,381.71
  6. Step 6: Final answer
    x = 18,517.40

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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.