Home / 11,391.12-15,720.14-6,610.70

Finding the Fourth Proportional to 11,391.12, 15,720.14 and 6,610.70

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Solution

The fourth proportional to 11,391.12, 15,720.14 and 6,610.70 is: 9,122.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,391.12 : 15,720.14 = 6,610.70 : x
  2. Step 2: Convert to fraction form
    11,391.12/15,720.14 = 6,610.70/x
  3. Step 3: Cross multiply
    11,391.12x = 15,720.14 × 6,610.70
  4. Step 4: Simplify right side
    11,391.12x = 103,921,067.42
  5. Step 5: Solve for x
    x = 103,921,067.42/11,391.12
  6. Step 6: Final answer
    x = 9,122.99

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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.