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Finding the Fourth Proportional to 14,515.20, 20,044.80 and 13,132.80

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Solution

The fourth proportional to 14,515.20, 20,044.80 and 13,132.80 is: 18,135.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,515.20 : 20,044.80 = 13,132.80 : x
  2. Step 2: Convert to fraction form
    14,515.20/20,044.80 = 13,132.80/x
  3. Step 3: Cross multiply
    14,515.20x = 20,044.80 × 13,132.80
  4. Step 4: Simplify right side
    14,515.20x = 263,244,349.44
  5. Step 5: Solve for x
    x = 263,244,349.44/14,515.20
  6. Step 6: Final answer
    x = 18,135.77

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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.