Home / 20,199.90-30,299.85-13,979.10

Finding the Fourth Proportional to 20,199.90, 30,299.85 and 13,979.10

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Solution

The fourth proportional to 20,199.90, 30,299.85 and 13,979.10 is: 20,968.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,199.90 : 30,299.85 = 13,979.10 : x
  2. Step 2: Convert to fraction form
    20,199.90/30,299.85 = 13,979.10/x
  3. Step 3: Cross multiply
    20,199.90x = 30,299.85 × 13,979.10
  4. Step 4: Simplify right side
    20,199.90x = 423,564,633.14
  5. Step 5: Solve for x
    x = 423,564,633.14/20,199.90
  6. Step 6: Final answer
    x = 20,968.65

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Similar ratio
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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.