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Finding the Fourth Proportional to 40,489.70, 60,734.55 and 12,784.10

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Solution

The fourth proportional to 40,489.70, 60,734.55 and 12,784.10 is: 19,176.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,489.70 : 60,734.55 = 12,784.10 : x
  2. Step 2: Convert to fraction form
    40,489.70/60,734.55 = 12,784.10/x
  3. Step 3: Cross multiply
    40,489.70x = 60,734.55 × 12,784.10
  4. Step 4: Simplify right side
    40,489.70x = 776,436,560.66
  5. Step 5: Solve for x
    x = 776,436,560.66/40,489.70
  6. Step 6: Final answer
    x = 19,176.15

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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.