Home / 13,127.18-18,115.11-7,158.97

Finding the Fourth Proportional to 13,127.18, 18,115.11 and 7,158.97

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Solution

The fourth proportional to 13,127.18, 18,115.11 and 7,158.97 is: 9,879.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.18 : 18,115.11 = 7,158.97 : x
  2. Step 2: Convert to fraction form
    13,127.18/18,115.11 = 7,158.97/x
  3. Step 3: Cross multiply
    13,127.18x = 18,115.11 × 7,158.97
  4. Step 4: Simplify right side
    13,127.18x = 129,685,529.04
  5. Step 5: Solve for x
    x = 129,685,529.04/13,127.18
  6. Step 6: Final answer
    x = 9,879.16

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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.