Home / 12,644.06-18,990.68-10,305.78

Finding the Fourth Proportional to 12,644.06, 18,990.68 and 10,305.78

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Solution

The fourth proportional to 12,644.06, 18,990.68 and 10,305.78 is: 15,478.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,644.06 : 18,990.68 = 10,305.78 : x
  2. Step 2: Convert to fraction form
    12,644.06/18,990.68 = 10,305.78/x
  3. Step 3: Cross multiply
    12,644.06x = 18,990.68 × 10,305.78
  4. Step 4: Simplify right side
    12,644.06x = 195,713,718.60
  5. Step 5: Solve for x
    x = 195,713,718.60/12,644.06
  6. Step 6: Final answer
    x = 15,478.71

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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.