Home / 13,119.53-18,104.82-7,151.20

Finding the Fourth Proportional to 13,119.53, 18,104.82 and 7,151.20

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Solution

The fourth proportional to 13,119.53, 18,104.82 and 7,151.20 is: 9,868.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.53 : 18,104.82 = 7,151.20 : x
  2. Step 2: Convert to fraction form
    13,119.53/18,104.82 = 7,151.20/x
  3. Step 3: Cross multiply
    13,119.53x = 18,104.82 × 7,151.20
  4. Step 4: Simplify right side
    13,119.53x = 129,471,188.78
  5. Step 5: Solve for x
    x = 129,471,188.78/13,119.53
  6. Step 6: Final answer
    x = 9,868.58

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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.