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Finding the Fourth Proportional to 21,404.96, 29,540.16 and 11,974.16

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Solution

The fourth proportional to 21,404.96, 29,540.16 and 11,974.16 is: 16,525.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,404.96 : 29,540.16 = 11,974.16 : x
  2. Step 2: Convert to fraction form
    21,404.96/29,540.16 = 11,974.16/x
  3. Step 3: Cross multiply
    21,404.96x = 29,540.16 × 11,974.16
  4. Step 4: Simplify right side
    21,404.96x = 353,718,602.27
  5. Step 5: Solve for x
    x = 353,718,602.27/21,404.96
  6. Step 6: Final answer
    x = 16,525.08

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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.