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Finding the Fourth Proportional to 40,489.20, 60,690.60 and 15,519.60

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Solution

The fourth proportional to 40,489.20, 60,690.60 and 15,519.60 is: 23,262.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,489.20 : 60,690.60 = 15,519.60 : x
  2. Step 2: Convert to fraction form
    40,489.20/60,690.60 = 15,519.60/x
  3. Step 3: Cross multiply
    40,489.20x = 60,690.60 × 15,519.60
  4. Step 4: Simplify right side
    40,489.20x = 941,893,835.76
  5. Step 5: Solve for x
    x = 941,893,835.76/40,489.20
  6. Step 6: Final answer
    x = 23,262.84

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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.