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Finding the Fourth Proportional to 8,658.42, 11,934.66 and 7,521.18

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Solution

The fourth proportional to 8,658.42, 11,934.66 and 7,521.18 is: 10,367.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.42 : 11,934.66 = 7,521.18 : x
  2. Step 2: Convert to fraction form
    8,658.42/11,934.66 = 7,521.18/x
  3. Step 3: Cross multiply
    8,658.42x = 11,934.66 × 7,521.18
  4. Step 4: Simplify right side
    8,658.42x = 89,762,726.10
  5. Step 5: Solve for x
    x = 89,762,726.10/8,658.42
  6. Step 6: Final answer
    x = 10,367.10

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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.