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Finding the Fourth Proportional to 21,654.25, 29,882.87 and 11,718.25

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Solution

The fourth proportional to 21,654.25, 29,882.87 and 11,718.25 is: 16,171.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,654.25 : 29,882.87 = 11,718.25 : x
  2. Step 2: Convert to fraction form
    21,654.25/29,882.87 = 11,718.25/x
  3. Step 3: Cross multiply
    21,654.25x = 29,882.87 × 11,718.25
  4. Step 4: Simplify right side
    21,654.25x = 350,174,882.79
  5. Step 5: Solve for x
    x = 350,174,882.79/21,654.25
  6. Step 6: Final answer
    x = 16,171.19

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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.