Home / 21,179.96-29,229.55-12,799.16

Finding the Fourth Proportional to 21,179.96, 29,229.55 and 12,799.16

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Solution

The fourth proportional to 21,179.96, 29,229.55 and 12,799.16 is: 17,663.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.96 : 29,229.55 = 12,799.16 : x
  2. Step 2: Convert to fraction form
    21,179.96/29,229.55 = 12,799.16/x
  3. Step 3: Cross multiply
    21,179.96x = 29,229.55 × 12,799.16
  4. Step 4: Simplify right side
    21,179.96x = 374,113,687.18
  5. Step 5: Solve for x
    x = 374,113,687.18/21,179.96
  6. Step 6: Final answer
    x = 17,663.57

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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.