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Finding the Fourth Proportional to 8,442.56, 12,655.20 and 4,060.80

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Solution

The fourth proportional to 8,442.56, 12,655.20 and 4,060.80 is: 6,087.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,442.56 : 12,655.20 = 4,060.80 : x
  2. Step 2: Convert to fraction form
    8,442.56/12,655.20 = 4,060.80/x
  3. Step 3: Cross multiply
    8,442.56x = 12,655.20 × 4,060.80
  4. Step 4: Simplify right side
    8,442.56x = 51,390,236.16
  5. Step 5: Solve for x
    x = 51,390,236.16/8,442.56
  6. Step 6: Final answer
    x = 6,087.04

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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.