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Finding the Fourth Proportional to 20,207.30, 30,310.95 and 16,999.70

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Solution

The fourth proportional to 20,207.30, 30,310.95 and 16,999.70 is: 25,499.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,207.30 : 30,310.95 = 16,999.70 : x
  2. Step 2: Convert to fraction form
    20,207.30/30,310.95 = 16,999.70/x
  3. Step 3: Cross multiply
    20,207.30x = 30,310.95 × 16,999.70
  4. Step 4: Simplify right side
    20,207.30x = 515,277,056.72
  5. Step 5: Solve for x
    x = 515,277,056.72/20,207.30
  6. Step 6: Final answer
    x = 25,499.55

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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.