Home / 12,489.39-18,728.60-6,644.61

Finding the Fourth Proportional to 12,489.39, 18,728.60 and 6,644.61

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Solution

The fourth proportional to 12,489.39, 18,728.60 and 6,644.61 is: 9,963.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.39 : 18,728.60 = 6,644.61 : x
  2. Step 2: Convert to fraction form
    12,489.39/18,728.60 = 6,644.61/x
  3. Step 3: Cross multiply
    12,489.39x = 18,728.60 × 6,644.61
  4. Step 4: Simplify right side
    12,489.39x = 124,444,209.62
  5. Step 5: Solve for x
    x = 124,444,209.62/12,489.39
  6. Step 6: Final answer
    x = 9,963.99

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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.