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Finding the Fourth Proportional to 7,149.72, 10,718.76 and 2,992.80

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Solution

The fourth proportional to 7,149.72, 10,718.76 and 2,992.80 is: 4,486.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149.72 : 10,718.76 = 2,992.80 : x
  2. Step 2: Convert to fraction form
    7,149.72/10,718.76 = 2,992.80/x
  3. Step 3: Cross multiply
    7,149.72x = 10,718.76 × 2,992.80
  4. Step 4: Simplify right side
    7,149.72x = 32,079,104.93
  5. Step 5: Solve for x
    x = 32,079,104.93/7,149.72
  6. Step 6: Final answer
    x = 4,486.76

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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.