Home / 29,268.72-40,390.89-15,839.99

Finding the Fourth Proportional to 29,268.72, 40,390.89 and 15,839.99

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Solution

The fourth proportional to 29,268.72, 40,390.89 and 15,839.99 is: 21,859.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,268.72 : 40,390.89 = 15,839.99 : x
  2. Step 2: Convert to fraction form
    29,268.72/40,390.89 = 15,839.99/x
  3. Step 3: Cross multiply
    29,268.72x = 40,390.89 × 15,839.99
  4. Step 4: Simplify right side
    29,268.72x = 639,791,304.09
  5. Step 5: Solve for x
    x = 639,791,304.09/29,268.72
  6. Step 6: Final answer
    x = 21,859.21

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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.