Home / 20,129.10-30,193.65-12,342.30

Finding the Fourth Proportional to 20,129.10, 30,193.65 and 12,342.30

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Solution

The fourth proportional to 20,129.10, 30,193.65 and 12,342.30 is: 18,513.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.10 : 30,193.65 = 12,342.30 : x
  2. Step 2: Convert to fraction form
    20,129.10/30,193.65 = 12,342.30/x
  3. Step 3: Cross multiply
    20,129.10x = 30,193.65 × 12,342.30
  4. Step 4: Simplify right side
    20,129.10x = 372,659,086.40
  5. Step 5: Solve for x
    x = 372,659,086.40/20,129.10
  6. Step 6: Final answer
    x = 18,513.45

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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.