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Finding the Fourth Proportional to 35,517.40, 49,002.78 and 20,613.40

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Solution

The fourth proportional to 35,517.40, 49,002.78 and 20,613.40 is: 28,439.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,517.40 : 49,002.78 = 20,613.40 : x
  2. Step 2: Convert to fraction form
    35,517.40/49,002.78 = 20,613.40/x
  3. Step 3: Cross multiply
    35,517.40x = 49,002.78 × 20,613.40
  4. Step 4: Simplify right side
    35,517.40x = 1,010,113,905.25
  5. Step 5: Solve for x
    x = 1,010,113,905.25/35,517.40
  6. Step 6: Final answer
    x = 28,439.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.