Home / 20,115.10-30,172.65-5,326.30

Finding the Fourth Proportional to 20,115.10, 30,172.65 and 5,326.30

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Solution

The fourth proportional to 20,115.10, 30,172.65 and 5,326.30 is: 7,989.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.10 : 30,172.65 = 5,326.30 : x
  2. Step 2: Convert to fraction form
    20,115.10/30,172.65 = 5,326.30/x
  3. Step 3: Cross multiply
    20,115.10x = 30,172.65 × 5,326.30
  4. Step 4: Simplify right side
    20,115.10x = 160,708,585.70
  5. Step 5: Solve for x
    x = 160,708,585.70/20,115.10
  6. Step 6: Final answer
    x = 7,989.45

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Similar ratio
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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.