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Finding the Fourth Proportional to 15,694.92, 21,654.09 and 8,980.11

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Solution

The fourth proportional to 15,694.92, 21,654.09 and 8,980.11 is: 12,389.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,694.92 : 21,654.09 = 8,980.11 : x
  2. Step 2: Convert to fraction form
    15,694.92/21,654.09 = 8,980.11/x
  3. Step 3: Cross multiply
    15,694.92x = 21,654.09 × 8,980.11
  4. Step 4: Simplify right side
    15,694.92x = 194,456,110.15
  5. Step 5: Solve for x
    x = 194,456,110.15/15,694.92
  6. Step 6: Final answer
    x = 12,389.75

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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.