Home / 31,115.07-42,937.88-17,687.79

Finding the Fourth Proportional to 31,115.07, 42,937.88 and 17,687.79

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Solution

The fourth proportional to 31,115.07, 42,937.88 and 17,687.79 is: 24,408.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,115.07 : 42,937.88 = 17,687.79 : x
  2. Step 2: Convert to fraction form
    31,115.07/42,937.88 = 17,687.79/x
  3. Step 3: Cross multiply
    31,115.07x = 42,937.88 × 17,687.79
  4. Step 4: Simplify right side
    31,115.07x = 759,476,116.05
  5. Step 5: Solve for x
    x = 759,476,116.05/31,115.07
  6. Step 6: Final answer
    x = 24,408.63

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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.