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Finding the Fourth Proportional to 8,909.70, 12,294.91 and 5,324.74

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Solution

The fourth proportional to 8,909.70, 12,294.91 and 5,324.74 is: 7,347.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.70 : 12,294.91 = 5,324.74 : x
  2. Step 2: Convert to fraction form
    8,909.70/12,294.91 = 5,324.74/x
  3. Step 3: Cross multiply
    8,909.70x = 12,294.91 × 5,324.74
  4. Step 4: Simplify right side
    8,909.70x = 65,467,145.04
  5. Step 5: Solve for x
    x = 65,467,145.04/8,909.70
  6. Step 6: Final answer
    x = 7,347.85

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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.