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Finding the Fourth Proportional to 16,763.20, 25,144.80 and 8,987.20

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Solution

The fourth proportional to 16,763.20, 25,144.80 and 8,987.20 is: 13,480.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,763.20 : 25,144.80 = 8,987.20 : x
  2. Step 2: Convert to fraction form
    16,763.20/25,144.80 = 8,987.20/x
  3. Step 3: Cross multiply
    16,763.20x = 25,144.80 × 8,987.20
  4. Step 4: Simplify right side
    16,763.20x = 225,981,346.56
  5. Step 5: Solve for x
    x = 225,981,346.56/16,763.20
  6. Step 6: Final answer
    x = 13,480.80

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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.