Home / 13,630.68-18,808.20-8,325.72

Finding the Fourth Proportional to 13,630.68, 18,808.20 and 8,325.72

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Solution

The fourth proportional to 13,630.68, 18,808.20 and 8,325.72 is: 11,488.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.68 : 18,808.20 = 8,325.72 : x
  2. Step 2: Convert to fraction form
    13,630.68/18,808.20 = 8,325.72/x
  3. Step 3: Cross multiply
    13,630.68x = 18,808.20 × 8,325.72
  4. Step 4: Simplify right side
    13,630.68x = 156,591,806.90
  5. Step 5: Solve for x
    x = 156,591,806.90/13,630.68
  6. Step 6: Final answer
    x = 11,488.19

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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.