Home / 21,578.05-29,776.98-12,144.79

Finding the Fourth Proportional to 21,578.05, 29,776.98 and 12,144.79

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Solution

The fourth proportional to 21,578.05, 29,776.98 and 12,144.79 is: 16,759.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,578.05 : 29,776.98 = 12,144.79 : x
  2. Step 2: Convert to fraction form
    21,578.05/29,776.98 = 12,144.79/x
  3. Step 3: Cross multiply
    21,578.05x = 29,776.98 × 12,144.79
  4. Step 4: Simplify right side
    21,578.05x = 361,635,168.93
  5. Step 5: Solve for x
    x = 361,635,168.93/21,578.05
  6. Step 6: Final answer
    x = 16,759.40

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.