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Finding the Fourth Proportional to 16,391.28, 22,619.94 and 8,939.28

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Solution

The fourth proportional to 16,391.28, 22,619.94 and 8,939.28 is: 12,336.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,391.28 : 22,619.94 = 8,939.28 : x
  2. Step 2: Convert to fraction form
    16,391.28/22,619.94 = 8,939.28/x
  3. Step 3: Cross multiply
    16,391.28x = 22,619.94 × 8,939.28
  4. Step 4: Simplify right side
    16,391.28x = 202,205,977.24
  5. Step 5: Solve for x
    x = 202,205,977.24/16,391.28
  6. Step 6: Final answer
    x = 12,336.19

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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.