Home / 8,787.49-12,136.94-6,408.21

Finding the Fourth Proportional to 8,787.49, 12,136.94 and 6,408.21

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Solution

The fourth proportional to 8,787.49, 12,136.94 and 6,408.21 is: 8,850.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,787.49 : 12,136.94 = 6,408.21 : x
  2. Step 2: Convert to fraction form
    8,787.49/12,136.94 = 6,408.21/x
  3. Step 3: Cross multiply
    8,787.49x = 12,136.94 × 6,408.21
  4. Step 4: Simplify right side
    8,787.49x = 77,776,097.78
  5. Step 5: Solve for x
    x = 77,776,097.78/8,787.49
  6. Step 6: Final answer
    x = 8,850.78

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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.