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Finding the Fourth Proportional to 8,603.60, 11,872.80 and 5,613.76

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Solution

The fourth proportional to 8,603.60, 11,872.80 and 5,613.76 is: 7,746.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603.60 : 11,872.80 = 5,613.76 : x
  2. Step 2: Convert to fraction form
    8,603.60/11,872.80 = 5,613.76/x
  3. Step 3: Cross multiply
    8,603.60x = 11,872.80 × 5,613.76
  4. Step 4: Simplify right side
    8,603.60x = 66,651,049.73
  5. Step 5: Solve for x
    x = 66,651,049.73/8,603.60
  6. Step 6: Final answer
    x = 7,746.88

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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.