Home / 21,335.22-29,438.04-12,381.54

Finding the Fourth Proportional to 21,335.22, 29,438.04 and 12,381.54

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Solution

The fourth proportional to 21,335.22, 29,438.04 and 12,381.54 is: 17,083.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.22 : 29,438.04 = 12,381.54 : x
  2. Step 2: Convert to fraction form
    21,335.22/29,438.04 = 12,381.54/x
  3. Step 3: Cross multiply
    21,335.22x = 29,438.04 × 12,381.54
  4. Step 4: Simplify right side
    21,335.22x = 364,488,269.78
  5. Step 5: Solve for x
    x = 364,488,269.78/21,335.22
  6. Step 6: Final answer
    x = 17,083.88

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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.