Home / 12,305.40-18,456.26-3,986.14

Finding the Fourth Proportional to 12,305.40, 18,456.26 and 3,986.14

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Solution

The fourth proportional to 12,305.40, 18,456.26 and 3,986.14 is: 5,978.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,305.40 : 18,456.26 = 3,986.14 : x
  2. Step 2: Convert to fraction form
    12,305.40/18,456.26 = 3,986.14/x
  3. Step 3: Cross multiply
    12,305.40x = 18,456.26 × 3,986.14
  4. Step 4: Simplify right side
    12,305.40x = 73,569,236.24
  5. Step 5: Solve for x
    x = 73,569,236.24/12,305.40
  6. Step 6: Final answer
    x = 5,978.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.