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Finding the Fourth Proportional to 20,649.60, 30,909.60 and 16,243.20

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Solution

The fourth proportional to 20,649.60, 30,909.60 and 16,243.20 is: 24,313.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649.60 : 30,909.60 = 16,243.20 : x
  2. Step 2: Convert to fraction form
    20,649.60/30,909.60 = 16,243.20/x
  3. Step 3: Cross multiply
    20,649.60x = 30,909.60 × 16,243.20
  4. Step 4: Simplify right side
    20,649.60x = 502,070,814.72
  5. Step 5: Solve for x
    x = 502,070,814.72/20,649.60
  6. Step 6: Final answer
    x = 24,313.83

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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.