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Finding the Fourth Proportional to 2,687.93, 4,031.93 and 2,515.71

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Solution

The fourth proportional to 2,687.93, 4,031.93 and 2,515.71 is: 3,773.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.93 : 4,031.93 = 2,515.71 : x
  2. Step 2: Convert to fraction form
    2,687.93/4,031.93 = 2,515.71/x
  3. Step 3: Cross multiply
    2,687.93x = 4,031.93 × 2,515.71
  4. Step 4: Simplify right side
    2,687.93x = 10,143,151.20
  5. Step 5: Solve for x
    x = 10,143,151.20/2,687.93
  6. Step 6: Final answer
    x = 3,773.59

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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.