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Finding the Fourth Proportional to 13,135.99, 18,127.51 and 7,167.53

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Solution

The fourth proportional to 13,135.99, 18,127.51 and 7,167.53 is: 9,891.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.99 : 18,127.51 = 7,167.53 : x
  2. Step 2: Convert to fraction form
    13,135.99/18,127.51 = 7,167.53/x
  3. Step 3: Cross multiply
    13,135.99x = 18,127.51 × 7,167.53
  4. Step 4: Simplify right side
    13,135.99x = 129,929,471.75
  5. Step 5: Solve for x
    x = 129,929,471.75/13,135.99
  6. Step 6: Final answer
    x = 9,891.11

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1.5x scale

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.