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Finding the Fourth Proportional to 8,447.80, 12,675.30 and 5,330.20

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Solution

The fourth proportional to 8,447.80, 12,675.30 and 5,330.20 is: 7,997.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,447.80 : 12,675.30 = 5,330.20 : x
  2. Step 2: Convert to fraction form
    8,447.80/12,675.30 = 5,330.20/x
  3. Step 3: Cross multiply
    8,447.80x = 12,675.30 × 5,330.20
  4. Step 4: Simplify right side
    8,447.80x = 67,561,884.06
  5. Step 5: Solve for x
    x = 67,561,884.06/8,447.80
  6. Step 6: Final answer
    x = 7,997.57

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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.