Home / 12,239.18-16,890.42-8,660.54

Finding the Fourth Proportional to 12,239.18, 16,890.42 and 8,660.54

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Solution

The fourth proportional to 12,239.18, 16,890.42 and 8,660.54 is: 11,951.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.18 : 16,890.42 = 8,660.54 : x
  2. Step 2: Convert to fraction form
    12,239.18/16,890.42 = 8,660.54/x
  3. Step 3: Cross multiply
    12,239.18x = 16,890.42 × 8,660.54
  4. Step 4: Simplify right side
    12,239.18x = 146,280,158.03
  5. Step 5: Solve for x
    x = 146,280,158.03/12,239.18
  6. Step 6: Final answer
    x = 11,951.79

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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.