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Finding the Fourth Proportional to 11,511.78, 15,886.08 and 6,732.78

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Solution

The fourth proportional to 11,511.78, 15,886.08 and 6,732.78 is: 9,291.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,511.78 : 15,886.08 = 6,732.78 : x
  2. Step 2: Convert to fraction form
    11,511.78/15,886.08 = 6,732.78/x
  3. Step 3: Cross multiply
    11,511.78x = 15,886.08 × 6,732.78
  4. Step 4: Simplify right side
    11,511.78x = 106,957,481.70
  5. Step 5: Solve for x
    x = 106,957,481.70/11,511.78
  6. Step 6: Final answer
    x = 9,291.13

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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.