Home / 21,723.83-29,982.09-13,766.78

Finding the Fourth Proportional to 21,723.83, 29,982.09 and 13,766.78

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Solution

The fourth proportional to 21,723.83, 29,982.09 and 13,766.78 is: 19,000.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,723.83 : 29,982.09 = 13,766.78 : x
  2. Step 2: Convert to fraction form
    21,723.83/29,982.09 = 13,766.78/x
  3. Step 3: Cross multiply
    21,723.83x = 29,982.09 × 13,766.78
  4. Step 4: Simplify right side
    21,723.83x = 412,756,836.97
  5. Step 5: Solve for x
    x = 412,756,836.97/21,723.83
  6. Step 6: Final answer
    x = 19,000.19

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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.