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Finding the Fourth Proportional to 12,119.96, 16,726.42 and 7,405.14

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Solution

The fourth proportional to 12,119.96, 16,726.42 and 7,405.14 is: 10,219.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,119.96 : 16,726.42 = 7,405.14 : x
  2. Step 2: Convert to fraction form
    12,119.96/16,726.42 = 7,405.14/x
  3. Step 3: Cross multiply
    12,119.96x = 16,726.42 × 7,405.14
  4. Step 4: Simplify right side
    12,119.96x = 123,861,481.80
  5. Step 5: Solve for x
    x = 123,861,481.80/12,119.96
  6. Step 6: Final answer
    x = 10,219.63

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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.