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Finding the Fourth Proportional to 12,387.64, 18,573.92 and 4,882.20

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Solution

The fourth proportional to 12,387.64, 18,573.92 and 4,882.20 is: 7,320.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.64 : 18,573.92 = 4,882.20 : x
  2. Step 2: Convert to fraction form
    12,387.64/18,573.92 = 4,882.20/x
  3. Step 3: Cross multiply
    12,387.64x = 18,573.92 × 4,882.20
  4. Step 4: Simplify right side
    12,387.64x = 90,681,592.22
  5. Step 5: Solve for x
    x = 90,681,592.22/12,387.64
  6. Step 6: Final answer
    x = 7,320.33

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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.