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Finding the Fourth Proportional to 8,630.84, 12,948.08 and 2,787.90

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Solution

The fourth proportional to 8,630.84, 12,948.08 and 2,787.90 is: 4,182.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,630.84 : 12,948.08 = 2,787.90 : x
  2. Step 2: Convert to fraction form
    8,630.84/12,948.08 = 2,787.90/x
  3. Step 3: Cross multiply
    8,630.84x = 12,948.08 × 2,787.90
  4. Step 4: Simplify right side
    8,630.84x = 36,097,938.29
  5. Step 5: Solve for x
    x = 36,097,938.29/8,630.84
  6. Step 6: Final answer
    x = 4,182.44

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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.