Home / 21,195.60-29,245.68-13,630.08

Finding the Fourth Proportional to 21,195.60, 29,245.68 and 13,630.08

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Solution

The fourth proportional to 21,195.60, 29,245.68 and 13,630.08 is: 18,806.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.60 : 29,245.68 = 13,630.08 : x
  2. Step 2: Convert to fraction form
    21,195.60/29,245.68 = 13,630.08/x
  3. Step 3: Cross multiply
    21,195.60x = 29,245.68 × 13,630.08
  4. Step 4: Simplify right side
    21,195.60x = 398,620,958.05
  5. Step 5: Solve for x
    x = 398,620,958.05/21,195.60
  6. Step 6: Final answer
    x = 18,806.78

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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.