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Finding the Fourth Proportional to 14,879.28, 20,531.34 and 8,909.76

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Solution

The fourth proportional to 14,879.28, 20,531.34 and 8,909.76 is: 12,294.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,879.28 : 20,531.34 = 8,909.76 : x
  2. Step 2: Convert to fraction form
    14,879.28/20,531.34 = 8,909.76/x
  3. Step 3: Cross multiply
    14,879.28x = 20,531.34 × 8,909.76
  4. Step 4: Simplify right side
    14,879.28x = 182,929,311.88
  5. Step 5: Solve for x
    x = 182,929,311.88/14,879.28
  6. Step 6: Final answer
    x = 12,294.23

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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.