Home / 11,115.42-15,340.76-6,400

Finding the Fourth Proportional to 11,115.42, 15,340.76 and 6,400

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Solution

The fourth proportional to 11,115.42, 15,340.76 and 6,400 is: 8,832.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.42 : 15,340.76 = 6,400 : x
  2. Step 2: Convert to fraction form
    11,115.42/15,340.76 = 6,400/x
  3. Step 3: Cross multiply
    11,115.42x = 15,340.76 × 6,400
  4. Step 4: Simplify right side
    11,115.42x = 98,180,864
  5. Step 5: Solve for x
    x = 98,180,864/11,115.42
  6. Step 6: Final answer
    x = 8,832.85

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Double scale
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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.