Home / 13,992.38-20,987.88-5,226.61

Finding the Fourth Proportional to 13,992.38, 20,987.88 and 5,226.61

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Solution

The fourth proportional to 13,992.38, 20,987.88 and 5,226.61 is: 7,839.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,992.38 : 20,987.88 = 5,226.61 : x
  2. Step 2: Convert to fraction form
    13,992.38/20,987.88 = 5,226.61/x
  3. Step 3: Cross multiply
    13,992.38x = 20,987.88 × 5,226.61
  4. Step 4: Simplify right side
    13,992.38x = 109,695,474.87
  5. Step 5: Solve for x
    x = 109,695,474.87/13,992.38
  6. Step 6: Final answer
    x = 7,839.66

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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.