Home / 11,151.88-15,389.49-6,115.85

Finding the Fourth Proportional to 11,151.88, 15,389.49 and 6,115.85

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Solution

The fourth proportional to 11,151.88, 15,389.49 and 6,115.85 is: 8,439.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,151.88 : 15,389.49 = 6,115.85 : x
  2. Step 2: Convert to fraction form
    11,151.88/15,389.49 = 6,115.85/x
  3. Step 3: Cross multiply
    11,151.88x = 15,389.49 × 6,115.85
  4. Step 4: Simplify right side
    11,151.88x = 94,119,902.68
  5. Step 5: Solve for x
    x = 94,119,902.68/11,151.88
  6. Step 6: Final answer
    x = 8,439.83

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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.