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Finding the Fourth Proportional to 7,691.54, 11,511.14 and 4,920.10

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Solution

The fourth proportional to 7,691.54, 11,511.14 and 4,920.10 is: 7,363.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,691.54 : 11,511.14 = 4,920.10 : x
  2. Step 2: Convert to fraction form
    7,691.54/11,511.14 = 4,920.10/x
  3. Step 3: Cross multiply
    7,691.54x = 11,511.14 × 4,920.10
  4. Step 4: Simplify right side
    7,691.54x = 56,635,959.91
  5. Step 5: Solve for x
    x = 56,635,959.91/7,691.54
  6. Step 6: Final answer
    x = 7,363.41

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1.5x scale

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.