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Finding the Fourth Proportional to 20,499.80, 30,748.08 and 7,350.80

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Solution

The fourth proportional to 20,499.80, 30,748.08 and 7,350.80 is: 11,025.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.80 : 30,748.08 = 7,350.80 : x
  2. Step 2: Convert to fraction form
    20,499.80/30,748.08 = 7,350.80/x
  3. Step 3: Cross multiply
    20,499.80x = 30,748.08 × 7,350.80
  4. Step 4: Simplify right side
    20,499.80x = 226,022,986.46
  5. Step 5: Solve for x
    x = 226,022,986.46/20,499.80
  6. Step 6: Final answer
    x = 11,025.62

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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.