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Finding the Fourth Proportional to 8,856.99, 12,227.90 and 7,872.84

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Solution

The fourth proportional to 8,856.99, 12,227.90 and 7,872.84 is: 10,869.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,856.99 : 12,227.90 = 7,872.84 : x
  2. Step 2: Convert to fraction form
    8,856.99/12,227.90 = 7,872.84/x
  3. Step 3: Cross multiply
    8,856.99x = 12,227.90 × 7,872.84
  4. Step 4: Simplify right side
    8,856.99x = 96,268,260.87
  5. Step 5: Solve for x
    x = 96,268,260.87/8,856.99
  6. Step 6: Final answer
    x = 10,869.18

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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.