Home / 20,145.10-30,217.65-19,999.30

Finding the Fourth Proportional to 20,145.10, 30,217.65 and 19,999.30

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Solution

The fourth proportional to 20,145.10, 30,217.65 and 19,999.30 is: 29,998.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.10 : 30,217.65 = 19,999.30 : x
  2. Step 2: Convert to fraction form
    20,145.10/30,217.65 = 19,999.30/x
  3. Step 3: Cross multiply
    20,145.10x = 30,217.65 × 19,999.30
  4. Step 4: Simplify right side
    20,145.10x = 604,331,847.65
  5. Step 5: Solve for x
    x = 604,331,847.65/20,145.10
  6. Step 6: Final answer
    x = 29,998.95

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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.