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Finding the Fourth Proportional to 8,523.81, 12,720.92 and 7,959.83

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Solution

The fourth proportional to 8,523.81, 12,720.92 and 7,959.83 is: 11,879.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,523.81 : 12,720.92 = 7,959.83 : x
  2. Step 2: Convert to fraction form
    8,523.81/12,720.92 = 7,959.83/x
  3. Step 3: Cross multiply
    8,523.81x = 12,720.92 × 7,959.83
  4. Step 4: Simplify right side
    8,523.81x = 101,256,257.24
  5. Step 5: Solve for x
    x = 101,256,257.24/8,523.81
  6. Step 6: Final answer
    x = 11,879.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.