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Finding the Fourth Proportional to 11,490.92, 15,856.35 and 6,454

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Solution

The fourth proportional to 11,490.92, 15,856.35 and 6,454 is: 8,905.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,490.92 : 15,856.35 = 6,454 : x
  2. Step 2: Convert to fraction form
    11,490.92/15,856.35 = 6,454/x
  3. Step 3: Cross multiply
    11,490.92x = 15,856.35 × 6,454
  4. Step 4: Simplify right side
    11,490.92x = 102,336,882.90
  5. Step 5: Solve for x
    x = 102,336,882.90/11,490.92
  6. Step 6: Final answer
    x = 8,905.89

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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.