Home / 13,387.12-20,080.82-5,487.62

Finding the Fourth Proportional to 13,387.12, 20,080.82 and 5,487.62

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Solution

The fourth proportional to 13,387.12, 20,080.82 and 5,487.62 is: 8,231.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.12 : 20,080.82 = 5,487.62 : x
  2. Step 2: Convert to fraction form
    13,387.12/20,080.82 = 5,487.62/x
  3. Step 3: Cross multiply
    13,387.12x = 20,080.82 × 5,487.62
  4. Step 4: Simplify right side
    13,387.12x = 110,195,909.45
  5. Step 5: Solve for x
    x = 110,195,909.45/13,387.12
  6. Step 6: Final answer
    x = 8,231.49

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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.