Home / 11,139.50-15,371.72-6,359.61

Finding the Fourth Proportional to 11,139.50, 15,371.72 and 6,359.61

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Solution

The fourth proportional to 11,139.50, 15,371.72 and 6,359.61 is: 8,775.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.50 : 15,371.72 = 6,359.61 : x
  2. Step 2: Convert to fraction form
    11,139.50/15,371.72 = 6,359.61/x
  3. Step 3: Cross multiply
    11,139.50x = 15,371.72 × 6,359.61
  4. Step 4: Simplify right side
    11,139.50x = 97,758,229.70
  5. Step 5: Solve for x
    x = 97,758,229.70/11,139.50
  6. Step 6: Final answer
    x = 8,775.82

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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.