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Finding the Fourth Proportional to 8,639.52, 12,944.68 and 6,904.52

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Solution

The fourth proportional to 8,639.52, 12,944.68 and 6,904.52 is: 10,345.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.52 : 12,944.68 = 6,904.52 : x
  2. Step 2: Convert to fraction form
    8,639.52/12,944.68 = 6,904.52/x
  3. Step 3: Cross multiply
    8,639.52x = 12,944.68 × 6,904.52
  4. Step 4: Simplify right side
    8,639.52x = 89,376,801.95
  5. Step 5: Solve for x
    x = 89,376,801.95/8,639.52
  6. Step 6: Final answer
    x = 10,345.11

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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.