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Finding the Fourth Proportional to 21,654.38, 29,883.05 and 11,718.38

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Solution

The fourth proportional to 21,654.38, 29,883.05 and 11,718.38 is: 16,171.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,654.38 : 29,883.05 = 11,718.38 : x
  2. Step 2: Convert to fraction form
    21,654.38/29,883.05 = 11,718.38/x
  3. Step 3: Cross multiply
    21,654.38x = 29,883.05 × 11,718.38
  4. Step 4: Simplify right side
    21,654.38x = 350,180,815.34
  5. Step 5: Solve for x
    x = 350,180,815.34/21,654.38
  6. Step 6: Final answer
    x = 16,171.37

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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.