Home / 20,072.90-30,120.15-8,387.30

Finding the Fourth Proportional to 20,072.90, 30,120.15 and 8,387.30

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Solution

The fourth proportional to 20,072.90, 30,120.15 and 8,387.30 is: 12,585.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,072.90 : 30,120.15 = 8,387.30 : x
  2. Step 2: Convert to fraction form
    20,072.90/30,120.15 = 8,387.30/x
  3. Step 3: Cross multiply
    20,072.90x = 30,120.15 × 8,387.30
  4. Step 4: Simplify right side
    20,072.90x = 252,626,734.10
  5. Step 5: Solve for x
    x = 252,626,734.10/20,072.90
  6. Step 6: Final answer
    x = 12,585.46

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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.