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Finding the Fourth Proportional to 16,391.84, 22,620.88 and 8,940.32

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Solution

The fourth proportional to 16,391.84, 22,620.88 and 8,940.32 is: 12,337.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,391.84 : 22,620.88 = 8,940.32 : x
  2. Step 2: Convert to fraction form
    16,391.84/22,620.88 = 8,940.32/x
  3. Step 3: Cross multiply
    16,391.84x = 22,620.88 × 8,940.32
  4. Step 4: Simplify right side
    16,391.84x = 202,237,905.88
  5. Step 5: Solve for x
    x = 202,237,905.88/16,391.84
  6. Step 6: Final answer
    x = 12,337.72

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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.