Home / 20,190.20-30,285.30-10,326.20

Finding the Fourth Proportional to 20,190.20, 30,285.30 and 10,326.20

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Solution

The fourth proportional to 20,190.20, 30,285.30 and 10,326.20 is: 15,489.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.20 : 30,285.30 = 10,326.20 : x
  2. Step 2: Convert to fraction form
    20,190.20/30,285.30 = 10,326.20/x
  3. Step 3: Cross multiply
    20,190.20x = 30,285.30 × 10,326.20
  4. Step 4: Simplify right side
    20,190.20x = 312,732,064.86
  5. Step 5: Solve for x
    x = 312,732,064.86/20,190.20
  6. Step 6: Final answer
    x = 15,489.30

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Half scale
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Double scale
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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.