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Finding the Fourth Proportional to 8,883.92, 12,261.32 and 8,490.28

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Solution

The fourth proportional to 8,883.92, 12,261.32 and 8,490.28 is: 11,718.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,883.92 : 12,261.32 = 8,490.28 : x
  2. Step 2: Convert to fraction form
    8,883.92/12,261.32 = 8,490.28/x
  3. Step 3: Cross multiply
    8,883.92x = 12,261.32 × 8,490.28
  4. Step 4: Simplify right side
    8,883.92x = 104,102,039.97
  5. Step 5: Solve for x
    x = 104,102,039.97/8,883.92
  6. Step 6: Final answer
    x = 11,718.03

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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.