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Finding the Fourth Proportional to 20,499.20, 30,748.80 and 7,352.90

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Solution

The fourth proportional to 20,499.20, 30,748.80 and 7,352.90 is: 11,029.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.20 : 30,748.80 = 7,352.90 : x
  2. Step 2: Convert to fraction form
    20,499.20/30,748.80 = 7,352.90/x
  3. Step 3: Cross multiply
    20,499.20x = 30,748.80 × 7,352.90
  4. Step 4: Simplify right side
    20,499.20x = 226,092,851.52
  5. Step 5: Solve for x
    x = 226,092,851.52/20,499.20
  6. Step 6: Final answer
    x = 11,029.35

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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.