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Finding the Fourth Proportional to 8,330.88, 11,489.28 and 6,442.56

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Solution

The fourth proportional to 8,330.88, 11,489.28 and 6,442.56 is: 8,885.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,330.88 : 11,489.28 = 6,442.56 : x
  2. Step 2: Convert to fraction form
    8,330.88/11,489.28 = 6,442.56/x
  3. Step 3: Cross multiply
    8,330.88x = 11,489.28 × 6,442.56
  4. Step 4: Simplify right side
    8,330.88x = 74,020,375.76
  5. Step 5: Solve for x
    x = 74,020,375.76/8,330.88
  6. Step 6: Final answer
    x = 8,885.06

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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.