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Finding the Fourth Proportional to 12,125.84, 16,724.17 and 7,878.26

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Solution

The fourth proportional to 12,125.84, 16,724.17 and 7,878.26 is: 10,865.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,125.84 : 16,724.17 = 7,878.26 : x
  2. Step 2: Convert to fraction form
    12,125.84/16,724.17 = 7,878.26/x
  3. Step 3: Cross multiply
    12,125.84x = 16,724.17 × 7,878.26
  4. Step 4: Simplify right side
    12,125.84x = 131,757,320.15
  5. Step 5: Solve for x
    x = 131,757,320.15/12,125.84
  6. Step 6: Final answer
    x = 10,865.83

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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.