Home / 11,139.12-15,371.52-6,660.23

Finding the Fourth Proportional to 11,139.12, 15,371.52 and 6,660.23

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Solution

The fourth proportional to 11,139.12, 15,371.52 and 6,660.23 is: 9,190.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.12 : 15,371.52 = 6,660.23 : x
  2. Step 2: Convert to fraction form
    11,139.12/15,371.52 = 6,660.23/x
  3. Step 3: Cross multiply
    11,139.12x = 15,371.52 × 6,660.23
  4. Step 4: Simplify right side
    11,139.12x = 102,377,756.82
  5. Step 5: Solve for x
    x = 102,377,756.82/11,139.12
  6. Step 6: Final answer
    x = 9,190.83

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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.