Home / 18,672.06-28,012.25-8,143.79

Finding the Fourth Proportional to 18,672.06, 28,012.25 and 8,143.79

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Solution

The fourth proportional to 18,672.06, 28,012.25 and 8,143.79 is: 12,217.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.06 : 28,012.25 = 8,143.79 : x
  2. Step 2: Convert to fraction form
    18,672.06/28,012.25 = 8,143.79/x
  3. Step 3: Cross multiply
    18,672.06x = 28,012.25 × 8,143.79
  4. Step 4: Simplify right side
    18,672.06x = 228,125,700.65
  5. Step 5: Solve for x
    x = 228,125,700.65/18,672.06
  6. Step 6: Final answer
    x = 12,217.49

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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.