Home / 13,937.90-20,890.65-5,613.80

Finding the Fourth Proportional to 13,937.90, 20,890.65 and 5,613.80

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Solution

The fourth proportional to 13,937.90, 20,890.65 and 5,613.80 is: 8,414.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,937.90 : 20,890.65 = 5,613.80 : x
  2. Step 2: Convert to fraction form
    13,937.90/20,890.65 = 5,613.80/x
  3. Step 3: Cross multiply
    13,937.90x = 20,890.65 × 5,613.80
  4. Step 4: Simplify right side
    13,937.90x = 117,275,930.97
  5. Step 5: Solve for x
    x = 117,275,930.97/13,937.90
  6. Step 6: Final answer
    x = 8,414.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.