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Finding the Fourth Proportional to 8,909.97, 13,356.15 and 4,221.74

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Solution

The fourth proportional to 8,909.97, 13,356.15 and 4,221.74 is: 6,328.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.97 : 13,356.15 = 4,221.74 : x
  2. Step 2: Convert to fraction form
    8,909.97/13,356.15 = 4,221.74/x
  3. Step 3: Cross multiply
    8,909.97x = 13,356.15 × 4,221.74
  4. Step 4: Simplify right side
    8,909.97x = 56,386,125.92
  5. Step 5: Solve for x
    x = 56,386,125.92/8,909.97
  6. Step 6: Final answer
    x = 6,328.43

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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.