Home / 9,136.05-13,691.35-5,129.89

Finding the Fourth Proportional to 9,136.05, 13,691.35 and 5,129.89

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Solution

The fourth proportional to 9,136.05, 13,691.35 and 5,129.89 is: 7,687.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,136.05 : 13,691.35 = 5,129.89 : x
  2. Step 2: Convert to fraction form
    9,136.05/13,691.35 = 5,129.89/x
  3. Step 3: Cross multiply
    9,136.05x = 13,691.35 × 5,129.89
  4. Step 4: Simplify right side
    9,136.05x = 70,235,119.45
  5. Step 5: Solve for x
    x = 70,235,119.45/9,136.05
  6. Step 6: Final answer
    x = 7,687.69

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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.