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Finding the Fourth Proportional to 8,787.78, 12,127.13 and 4,808.90

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Solution

The fourth proportional to 8,787.78, 12,127.13 and 4,808.90 is: 6,636.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,787.78 : 12,127.13 = 4,808.90 : x
  2. Step 2: Convert to fraction form
    8,787.78/12,127.13 = 4,808.90/x
  3. Step 3: Cross multiply
    8,787.78x = 12,127.13 × 4,808.90
  4. Step 4: Simplify right side
    8,787.78x = 58,318,070.78
  5. Step 5: Solve for x
    x = 58,318,070.78/8,787.78
  6. Step 6: Final answer
    x = 6,636.27

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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.