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Finding the Fourth Proportional to 14,987.62, 20,691.20 and 9,020.75

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Solution

The fourth proportional to 14,987.62, 20,691.20 and 9,020.75 is: 12,453.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987.62 : 20,691.20 = 9,020.75 : x
  2. Step 2: Convert to fraction form
    14,987.62/20,691.20 = 9,020.75/x
  3. Step 3: Cross multiply
    14,987.62x = 20,691.20 × 9,020.75
  4. Step 4: Simplify right side
    14,987.62x = 186,650,142.40
  5. Step 5: Solve for x
    x = 186,650,142.40/14,987.62
  6. Step 6: Final answer
    x = 12,453.62

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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.