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Finding the Fourth Proportional to 8,630.40, 12,945.60 and 2,787.01

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Solution

The fourth proportional to 8,630.40, 12,945.60 and 2,787.01 is: 4,180.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,630.40 : 12,945.60 = 2,787.01 : x
  2. Step 2: Convert to fraction form
    8,630.40/12,945.60 = 2,787.01/x
  3. Step 3: Cross multiply
    8,630.40x = 12,945.60 × 2,787.01
  4. Step 4: Simplify right side
    8,630.40x = 36,079,516.66
  5. Step 5: Solve for x
    x = 36,079,516.66/8,630.40
  6. Step 6: Final answer
    x = 4,180.52

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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.