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Finding the Fourth Proportional to 8,787.16, 12,124.18 and 5,647.64

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Solution

The fourth proportional to 8,787.16, 12,124.18 and 5,647.64 is: 7,792.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,787.16 : 12,124.18 = 5,647.64 : x
  2. Step 2: Convert to fraction form
    8,787.16/12,124.18 = 5,647.64/x
  3. Step 3: Cross multiply
    8,787.16x = 12,124.18 × 5,647.64
  4. Step 4: Simplify right side
    8,787.16x = 68,473,003.94
  5. Step 5: Solve for x
    x = 68,473,003.94/8,787.16
  6. Step 6: Final answer
    x = 7,792.39

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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.