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Finding the Fourth Proportional to 21,151.29, 29,202.22 and 13,205.19

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Solution

The fourth proportional to 21,151.29, 29,202.22 and 13,205.19 is: 18,231.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.29 : 29,202.22 = 13,205.19 : x
  2. Step 2: Convert to fraction form
    21,151.29/29,202.22 = 13,205.19/x
  3. Step 3: Cross multiply
    21,151.29x = 29,202.22 × 13,205.19
  4. Step 4: Simplify right side
    21,151.29x = 385,620,863.52
  5. Step 5: Solve for x
    x = 385,620,863.52/21,151.29
  6. Step 6: Final answer
    x = 18,231.55

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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.