Home / 20,142.10-30,213.15-14,237.20

Finding the Fourth Proportional to 20,142.10, 30,213.15 and 14,237.20

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Solution

The fourth proportional to 20,142.10, 30,213.15 and 14,237.20 is: 21,355.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.10 : 30,213.15 = 14,237.20 : x
  2. Step 2: Convert to fraction form
    20,142.10/30,213.15 = 14,237.20/x
  3. Step 3: Cross multiply
    20,142.10x = 30,213.15 × 14,237.20
  4. Step 4: Simplify right side
    20,142.10x = 430,150,659.18
  5. Step 5: Solve for x
    x = 430,150,659.18/20,142.10
  6. Step 6: Final answer
    x = 21,355.80

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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.