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Finding the Fourth Proportional to 8,889.30, 13,382.15 and 8,114.28

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Solution

The fourth proportional to 8,889.30, 13,382.15 and 8,114.28 is: 12,215.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,889.30 : 13,382.15 = 8,114.28 : x
  2. Step 2: Convert to fraction form
    8,889.30/13,382.15 = 8,114.28/x
  3. Step 3: Cross multiply
    8,889.30x = 13,382.15 × 8,114.28
  4. Step 4: Simplify right side
    8,889.30x = 108,586,471.53
  5. Step 5: Solve for x
    x = 108,586,471.53/8,889.30
  6. Step 6: Final answer
    x = 12,215.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.