Home / 13,119.38-18,104.52-7,151.10

Finding the Fourth Proportional to 13,119.38, 18,104.52 and 7,151.10

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Solution

The fourth proportional to 13,119.38, 18,104.52 and 7,151.10 is: 9,868.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.38 : 18,104.52 = 7,151.10 : x
  2. Step 2: Convert to fraction form
    13,119.38/18,104.52 = 7,151.10/x
  3. Step 3: Cross multiply
    13,119.38x = 18,104.52 × 7,151.10
  4. Step 4: Simplify right side
    13,119.38x = 129,467,232.97
  5. Step 5: Solve for x
    x = 129,467,232.97/13,119.38
  6. Step 6: Final answer
    x = 9,868.40

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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.