Home / 40,931.20-61,396.80-28,489.60

Finding the Fourth Proportional to 40,931.20, 61,396.80 and 28,489.60

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Solution

The fourth proportional to 40,931.20, 61,396.80 and 28,489.60 is: 42,734.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,931.20 : 61,396.80 = 28,489.60 : x
  2. Step 2: Convert to fraction form
    40,931.20/61,396.80 = 28,489.60/x
  3. Step 3: Cross multiply
    40,931.20x = 61,396.80 × 28,489.60
  4. Step 4: Simplify right side
    40,931.20x = 1,749,170,273.28
  5. Step 5: Solve for x
    x = 1,749,170,273.28/40,931.20
  6. Step 6: Final answer
    x = 42,734.40

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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.