Home / 20,013.28-29,987.52-12,198.40

Finding the Fourth Proportional to 20,013.28, 29,987.52 and 12,198.40

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Solution

The fourth proportional to 20,013.28, 29,987.52 and 12,198.40 is: 18,277.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,013.28 : 29,987.52 = 12,198.40 : x
  2. Step 2: Convert to fraction form
    20,013.28/29,987.52 = 12,198.40/x
  3. Step 3: Cross multiply
    20,013.28x = 29,987.52 × 12,198.40
  4. Step 4: Simplify right side
    20,013.28x = 365,799,763.97
  5. Step 5: Solve for x
    x = 365,799,763.97/20,013.28
  6. Step 6: Final answer
    x = 18,277.85

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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.