Home / 3,878.60-5,818.92-1,687.76

Finding the Fourth Proportional to 3,878.60, 5,818.92 and 1,687.76

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Solution

The fourth proportional to 3,878.60, 5,818.92 and 1,687.76 is: 2,532.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.60 : 5,818.92 = 1,687.76 : x
  2. Step 2: Convert to fraction form
    3,878.60/5,818.92 = 1,687.76/x
  3. Step 3: Cross multiply
    3,878.60x = 5,818.92 × 1,687.76
  4. Step 4: Simplify right side
    3,878.60x = 9,820,940.42
  5. Step 5: Solve for x
    x = 9,820,940.42/3,878.60
  6. Step 6: Final answer
    x = 2,532.08

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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.