Home / 5,187.53-7,781.34-1,291.79

Finding the Fourth Proportional to 5,187.53, 7,781.34 and 1,291.79

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Solution

The fourth proportional to 5,187.53, 7,781.34 and 1,291.79 is: 1,937.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.53 : 7,781.34 = 1,291.79 : x
  2. Step 2: Convert to fraction form
    5,187.53/7,781.34 = 1,291.79/x
  3. Step 3: Cross multiply
    5,187.53x = 7,781.34 × 1,291.79
  4. Step 4: Simplify right side
    5,187.53x = 10,051,857.20
  5. Step 5: Solve for x
    x = 10,051,857.20/5,187.53
  6. Step 6: Final answer
    x = 1,937.70

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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.