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Finding the Fourth Proportional to 20,169.40, 30,254.10 and 16,913.20

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Solution

The fourth proportional to 20,169.40, 30,254.10 and 16,913.20 is: 25,369.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,169.40 : 30,254.10 = 16,913.20 : x
  2. Step 2: Convert to fraction form
    20,169.40/30,254.10 = 16,913.20/x
  3. Step 3: Cross multiply
    20,169.40x = 30,254.10 × 16,913.20
  4. Step 4: Simplify right side
    20,169.40x = 511,693,644.12
  5. Step 5: Solve for x
    x = 511,693,644.12/20,169.40
  6. Step 6: Final answer
    x = 25,369.80

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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.