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Finding the Fourth Proportional to 8,863.74, 12,237.21 and 7,879.68

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Solution

The fourth proportional to 8,863.74, 12,237.21 and 7,879.68 is: 10,878.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,863.74 : 12,237.21 = 7,879.68 : x
  2. Step 2: Convert to fraction form
    8,863.74/12,237.21 = 7,879.68/x
  3. Step 3: Cross multiply
    8,863.74x = 12,237.21 × 7,879.68
  4. Step 4: Simplify right side
    8,863.74x = 96,425,298.89
  5. Step 5: Solve for x
    x = 96,425,298.89/8,863.74
  6. Step 6: Final answer
    x = 10,878.62

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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.