Home / 13,136.20-18,127.29-7,167.82

Finding the Fourth Proportional to 13,136.20, 18,127.29 and 7,167.82

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Solution

The fourth proportional to 13,136.20, 18,127.29 and 7,167.82 is: 9,891.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.20 : 18,127.29 = 7,167.82 : x
  2. Step 2: Convert to fraction form
    13,136.20/18,127.29 = 7,167.82/x
  3. Step 3: Cross multiply
    13,136.20x = 18,127.29 × 7,167.82
  4. Step 4: Simplify right side
    13,136.20x = 129,933,151.81
  5. Step 5: Solve for x
    x = 129,933,151.81/13,136.20
  6. Step 6: Final answer
    x = 9,891.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.