Home / 13,120.13-18,105.24-7,151.66

Finding the Fourth Proportional to 13,120.13, 18,105.24 and 7,151.66

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Solution

The fourth proportional to 13,120.13, 18,105.24 and 7,151.66 is: 9,869.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.13 : 18,105.24 = 7,151.66 : x
  2. Step 2: Convert to fraction form
    13,120.13/18,105.24 = 7,151.66/x
  3. Step 3: Cross multiply
    13,120.13x = 18,105.24 × 7,151.66
  4. Step 4: Simplify right side
    13,120.13x = 129,482,586.50
  5. Step 5: Solve for x
    x = 129,482,586.50/13,120.13
  6. Step 6: Final answer
    x = 9,869.00

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Half scale
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Double scale
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Similar ratio
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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.