Home / 13,116.68-18,103.36-7,738.78

Finding the Fourth Proportional to 13,116.68, 18,103.36 and 7,738.78

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Solution

The fourth proportional to 13,116.68, 18,103.36 and 7,738.78 is: 10,680.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,116.68 : 18,103.36 = 7,738.78 : x
  2. Step 2: Convert to fraction form
    13,116.68/18,103.36 = 7,738.78/x
  3. Step 3: Cross multiply
    13,116.68x = 18,103.36 × 7,738.78
  4. Step 4: Simplify right side
    13,116.68x = 140,097,920.30
  5. Step 5: Solve for x
    x = 140,097,920.30/13,116.68
  6. Step 6: Final answer
    x = 10,680.90

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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.