Home / 11,115.36-15,344.78-8,591.78

Finding the Fourth Proportional to 11,115.36, 15,344.78 and 8,591.78

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Solution

The fourth proportional to 11,115.36, 15,344.78 and 8,591.78 is: 11,860.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.36 : 15,344.78 = 8,591.78 : x
  2. Step 2: Convert to fraction form
    11,115.36/15,344.78 = 8,591.78/x
  3. Step 3: Cross multiply
    11,115.36x = 15,344.78 × 8,591.78
  4. Step 4: Simplify right side
    11,115.36x = 131,838,973.91
  5. Step 5: Solve for x
    x = 131,838,973.91/11,115.36
  6. Step 6: Final answer
    x = 11,860.97

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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.