Home / 12,580.28-18,872.80-4,258.06

Finding the Fourth Proportional to 12,580.28, 18,872.80 and 4,258.06

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Solution

The fourth proportional to 12,580.28, 18,872.80 and 4,258.06 is: 6,387.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,580.28 : 18,872.80 = 4,258.06 : x
  2. Step 2: Convert to fraction form
    12,580.28/18,872.80 = 4,258.06/x
  3. Step 3: Cross multiply
    12,580.28x = 18,872.80 × 4,258.06
  4. Step 4: Simplify right side
    12,580.28x = 80,361,456.94
  5. Step 5: Solve for x
    x = 80,361,456.94/12,580.28
  6. Step 6: Final answer
    x = 6,387.89

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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.