Home / 10,109.07-15,218.19-9,091.85

Finding the Fourth Proportional to 10,109.07, 15,218.19 and 9,091.85

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Solution

The fourth proportional to 10,109.07, 15,218.19 and 9,091.85 is: 13,686.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,109.07 : 15,218.19 = 9,091.85 : x
  2. Step 2: Convert to fraction form
    10,109.07/15,218.19 = 9,091.85/x
  3. Step 3: Cross multiply
    10,109.07x = 15,218.19 × 9,091.85
  4. Step 4: Simplify right side
    10,109.07x = 138,361,553.13
  5. Step 5: Solve for x
    x = 138,361,553.13/10,109.07
  6. Step 6: Final answer
    x = 13,686.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.