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Finding the Fourth Proportional to 18,722.70, 28,001.43 and 16,657.20

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Solution

The fourth proportional to 18,722.70, 28,001.43 and 16,657.20 is: 24,912.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722.70 : 28,001.43 = 16,657.20 : x
  2. Step 2: Convert to fraction form
    18,722.70/28,001.43 = 16,657.20/x
  3. Step 3: Cross multiply
    18,722.70x = 28,001.43 × 16,657.20
  4. Step 4: Simplify right side
    18,722.70x = 466,425,419.80
  5. Step 5: Solve for x
    x = 466,425,419.80/18,722.70
  6. Step 6: Final answer
    x = 24,912.29

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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.