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Finding the Fourth Proportional to 16,115.91, 22,239.60 and 8,945.40

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Solution

The fourth proportional to 16,115.91, 22,239.60 and 8,945.40 is: 12,344.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,115.91 : 22,239.60 = 8,945.40 : x
  2. Step 2: Convert to fraction form
    16,115.91/22,239.60 = 8,945.40/x
  3. Step 3: Cross multiply
    16,115.91x = 22,239.60 × 8,945.40
  4. Step 4: Simplify right side
    16,115.91x = 198,942,117.84
  5. Step 5: Solve for x
    x = 198,942,117.84/16,115.91
  6. Step 6: Final answer
    x = 12,344.46

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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.