Home / 15,016.68-20,731.46-9,987.75

Finding the Fourth Proportional to 15,016.68, 20,731.46 and 9,987.75

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Solution

The fourth proportional to 15,016.68, 20,731.46 and 9,987.75 is: 13,788.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,016.68 : 20,731.46 = 9,987.75 : x
  2. Step 2: Convert to fraction form
    15,016.68/20,731.46 = 9,987.75/x
  3. Step 3: Cross multiply
    15,016.68x = 20,731.46 × 9,987.75
  4. Step 4: Simplify right side
    15,016.68x = 207,060,589.68
  5. Step 5: Solve for x
    x = 207,060,589.68/15,016.68
  6. Step 6: Final answer
    x = 13,788.71

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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.