Home / 13,127.13-18,115.53-7,158.75

Finding the Fourth Proportional to 13,127.13, 18,115.53 and 7,158.75

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Solution

The fourth proportional to 13,127.13, 18,115.53 and 7,158.75 is: 9,879.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.13 : 18,115.53 = 7,158.75 : x
  2. Step 2: Convert to fraction form
    13,127.13/18,115.53 = 7,158.75/x
  3. Step 3: Cross multiply
    13,127.13x = 18,115.53 × 7,158.75
  4. Step 4: Simplify right side
    13,127.13x = 129,684,550.39
  5. Step 5: Solve for x
    x = 129,684,550.39/13,127.13
  6. Step 6: Final answer
    x = 9,879.12

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Double scale
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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.