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Finding the Fourth Proportional to 22,418, 30,939 and 12,482

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Solution

The fourth proportional to 22,418, 30,939 and 12,482 is: 17,226.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,418 : 30,939 = 12,482 : x
  2. Step 2: Convert to fraction form
    22,418/30,939 = 12,482/x
  3. Step 3: Cross multiply
    22,418x = 30,939 × 12,482
  4. Step 4: Simplify right side
    22,418x = 386,180,598
  5. Step 5: Solve for x
    x = 386,180,598/22,418
  6. Step 6: Final answer
    x = 17,226.36

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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.