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Finding the Fourth Proportional to 20,000.40, 30,000.60 and 16,719.90

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Solution

The fourth proportional to 20,000.40, 30,000.60 and 16,719.90 is: 25,079.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,000.40 : 30,000.60 = 16,719.90 : x
  2. Step 2: Convert to fraction form
    20,000.40/30,000.60 = 16,719.90/x
  3. Step 3: Cross multiply
    20,000.40x = 30,000.60 × 16,719.90
  4. Step 4: Simplify right side
    20,000.40x = 501,607,031.94
  5. Step 5: Solve for x
    x = 501,607,031.94/20,000.40
  6. Step 6: Final answer
    x = 25,079.85

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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.