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Finding the Fourth Proportional to 21,658.29, 29,888.43 and 11,722.29

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Solution

The fourth proportional to 21,658.29, 29,888.43 and 11,722.29 is: 16,176.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,658.29 : 29,888.43 = 11,722.29 : x
  2. Step 2: Convert to fraction form
    21,658.29/29,888.43 = 11,722.29/x
  3. Step 3: Cross multiply
    21,658.29x = 29,888.43 × 11,722.29
  4. Step 4: Simplify right side
    21,658.29x = 350,360,844.10
  5. Step 5: Solve for x
    x = 350,360,844.10/21,658.29
  6. Step 6: Final answer
    x = 16,176.75

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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.