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Finding the Fourth Proportional to 8,879.92, 12,250.80 and 7,760.91

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Solution

The fourth proportional to 8,879.92, 12,250.80 and 7,760.91 is: 10,707.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,879.92 : 12,250.80 = 7,760.91 : x
  2. Step 2: Convert to fraction form
    8,879.92/12,250.80 = 7,760.91/x
  3. Step 3: Cross multiply
    8,879.92x = 12,250.80 × 7,760.91
  4. Step 4: Simplify right side
    8,879.92x = 95,077,356.23
  5. Step 5: Solve for x
    x = 95,077,356.23/8,879.92
  6. Step 6: Final answer
    x = 10,707.01

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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.