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Finding the Fourth Proportional to 20,496.60, 30,744.90 and 18,682.20

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Solution

The fourth proportional to 20,496.60, 30,744.90 and 18,682.20 is: 28,023.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,496.60 : 30,744.90 = 18,682.20 : x
  2. Step 2: Convert to fraction form
    20,496.60/30,744.90 = 18,682.20/x
  3. Step 3: Cross multiply
    20,496.60x = 30,744.90 × 18,682.20
  4. Step 4: Simplify right side
    20,496.60x = 574,382,370.78
  5. Step 5: Solve for x
    x = 574,382,370.78/20,496.60
  6. Step 6: Final answer
    x = 28,023.30

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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.