Home / 20,115.68-30,159.66-8,865.56

Finding the Fourth Proportional to 20,115.68, 30,159.66 and 8,865.56

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Solution

The fourth proportional to 20,115.68, 30,159.66 and 8,865.56 is: 13,292.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.68 : 30,159.66 = 8,865.56 : x
  2. Step 2: Convert to fraction form
    20,115.68/30,159.66 = 8,865.56/x
  3. Step 3: Cross multiply
    20,115.68x = 30,159.66 × 8,865.56
  4. Step 4: Simplify right side
    20,115.68x = 267,382,275.31
  5. Step 5: Solve for x
    x = 267,382,275.31/20,115.68
  6. Step 6: Final answer
    x = 13,292.23

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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.