Home / 20,138.30-30,207.45-16,855.10

Finding the Fourth Proportional to 20,138.30, 30,207.45 and 16,855.10

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Solution

The fourth proportional to 20,138.30, 30,207.45 and 16,855.10 is: 25,282.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.30 : 30,207.45 = 16,855.10 : x
  2. Step 2: Convert to fraction form
    20,138.30/30,207.45 = 16,855.10/x
  3. Step 3: Cross multiply
    20,138.30x = 30,207.45 × 16,855.10
  4. Step 4: Simplify right side
    20,138.30x = 509,149,590.50
  5. Step 5: Solve for x
    x = 509,149,590.50/20,138.30
  6. Step 6: Final answer
    x = 25,282.65

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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.