Home / 13,120.20-18,105.89-7,151.90

Finding the Fourth Proportional to 13,120.20, 18,105.89 and 7,151.90

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Solution

The fourth proportional to 13,120.20, 18,105.89 and 7,151.90 is: 9,869.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.20 : 18,105.89 = 7,151.90 : x
  2. Step 2: Convert to fraction form
    13,120.20/18,105.89 = 7,151.90/x
  3. Step 3: Cross multiply
    13,120.20x = 18,105.89 × 7,151.90
  4. Step 4: Simplify right side
    13,120.20x = 129,491,388.40
  5. Step 5: Solve for x
    x = 129,491,388.40/13,120.20
  6. Step 6: Final answer
    x = 9,869.62

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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.