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Finding the Fourth Proportional to 7,385.79, 11,078.72 and 1,839.13

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Solution

The fourth proportional to 7,385.79, 11,078.72 and 1,839.13 is: 2,758.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,385.79 : 11,078.72 = 1,839.13 : x
  2. Step 2: Convert to fraction form
    7,385.79/11,078.72 = 1,839.13/x
  3. Step 3: Cross multiply
    7,385.79x = 11,078.72 × 1,839.13
  4. Step 4: Simplify right side
    7,385.79x = 20,375,206.31
  5. Step 5: Solve for x
    x = 20,375,206.31/7,385.79
  6. Step 6: Final answer
    x = 2,758.70

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.