Home / 5,151.20-7,727.60-1,687.36

Finding the Fourth Proportional to 5,151.20, 7,727.60 and 1,687.36

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Solution

The fourth proportional to 5,151.20, 7,727.60 and 1,687.36 is: 2,531.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.20 : 7,727.60 = 1,687.36 : x
  2. Step 2: Convert to fraction form
    5,151.20/7,727.60 = 1,687.36/x
  3. Step 3: Cross multiply
    5,151.20x = 7,727.60 × 1,687.36
  4. Step 4: Simplify right side
    5,151.20x = 13,039,243.14
  5. Step 5: Solve for x
    x = 13,039,243.14/5,151.20
  6. Step 6: Final answer
    x = 2,531.30

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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.