Home / 5,186.77-7,780.17-1,899.85

Finding the Fourth Proportional to 5,186.77, 7,780.17 and 1,899.85

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Solution

The fourth proportional to 5,186.77, 7,780.17 and 1,899.85 is: 2,849.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,186.77 : 7,780.17 = 1,899.85 : x
  2. Step 2: Convert to fraction form
    5,186.77/7,780.17 = 1,899.85/x
  3. Step 3: Cross multiply
    5,186.77x = 7,780.17 × 1,899.85
  4. Step 4: Simplify right side
    5,186.77x = 14,781,155.97
  5. Step 5: Solve for x
    x = 14,781,155.97/5,186.77
  6. Step 6: Final answer
    x = 2,849.78

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Double scale
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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.