Home / 15,202.18-20,979.45-8,487.69

Finding the Fourth Proportional to 15,202.18, 20,979.45 and 8,487.69

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Solution

The fourth proportional to 15,202.18, 20,979.45 and 8,487.69 is: 11,713.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,202.18 : 20,979.45 = 8,487.69 : x
  2. Step 2: Convert to fraction form
    15,202.18/20,979.45 = 8,487.69/x
  3. Step 3: Cross multiply
    15,202.18x = 20,979.45 × 8,487.69
  4. Step 4: Simplify right side
    15,202.18x = 178,067,067.97
  5. Step 5: Solve for x
    x = 178,067,067.97/15,202.18
  6. Step 6: Final answer
    x = 11,713.26

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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.