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Finding the Fourth Proportional to 12,379.41, 17,084.49 and 7,074.11

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Solution

The fourth proportional to 12,379.41, 17,084.49 and 7,074.11 is: 9,762.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.41 : 17,084.49 = 7,074.11 : x
  2. Step 2: Convert to fraction form
    12,379.41/17,084.49 = 7,074.11/x
  3. Step 3: Cross multiply
    12,379.41x = 17,084.49 × 7,074.11
  4. Step 4: Simplify right side
    12,379.41x = 120,857,476.13
  5. Step 5: Solve for x
    x = 120,857,476.13/12,379.41
  6. Step 6: Final answer
    x = 9,762.78

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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.