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Finding the Fourth Proportional to 12,149.84, 16,771 and 7,115.68

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Solution

The fourth proportional to 12,149.84, 16,771 and 7,115.68 is: 9,822.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,149.84 : 16,771 = 7,115.68 : x
  2. Step 2: Convert to fraction form
    12,149.84/16,771 = 7,115.68/x
  3. Step 3: Cross multiply
    12,149.84x = 16,771 × 7,115.68
  4. Step 4: Simplify right side
    12,149.84x = 119,337,069.28
  5. Step 5: Solve for x
    x = 119,337,069.28/12,149.84
  6. Step 6: Final answer
    x = 9,822.11

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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.