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Finding the Fourth Proportional to 12,279.62, 18,420.62 and 4,882.43

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Solution

The fourth proportional to 12,279.62, 18,420.62 and 4,882.43 is: 7,324.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.62 : 18,420.62 = 4,882.43 : x
  2. Step 2: Convert to fraction form
    12,279.62/18,420.62 = 4,882.43/x
  3. Step 3: Cross multiply
    12,279.62x = 18,420.62 × 4,882.43
  4. Step 4: Simplify right side
    12,279.62x = 89,937,387.71
  5. Step 5: Solve for x
    x = 89,937,387.71/12,279.62
  6. Step 6: Final answer
    x = 7,324.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.