Home / 13,116.08-18,100.20-7,147.75

Finding the Fourth Proportional to 13,116.08, 18,100.20 and 7,147.75

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Solution

The fourth proportional to 13,116.08, 18,100.20 and 7,147.75 is: 9,863.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,116.08 : 18,100.20 = 7,147.75 : x
  2. Step 2: Convert to fraction form
    13,116.08/18,100.20 = 7,147.75/x
  3. Step 3: Cross multiply
    13,116.08x = 18,100.20 × 7,147.75
  4. Step 4: Simplify right side
    13,116.08x = 129,375,763.49
  5. Step 5: Solve for x
    x = 129,375,763.49/13,116.08
  6. Step 6: Final answer
    x = 9,863.90

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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.