Home / 13,127.62-18,115.75-7,159.28

Finding the Fourth Proportional to 13,127.62, 18,115.75 and 7,159.28

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Solution

The fourth proportional to 13,127.62, 18,115.75 and 7,159.28 is: 9,879.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.62 : 18,115.75 = 7,159.28 : x
  2. Step 2: Convert to fraction form
    13,127.62/18,115.75 = 7,159.28/x
  3. Step 3: Cross multiply
    13,127.62x = 18,115.75 × 7,159.28
  4. Step 4: Simplify right side
    13,127.62x = 129,695,726.66
  5. Step 5: Solve for x
    x = 129,695,726.66/13,127.62
  6. Step 6: Final answer
    x = 9,879.61

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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.