Home / 31,821.29-43,908.50-18,389.95

Finding the Fourth Proportional to 31,821.29, 43,908.50 and 18,389.95

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Solution

The fourth proportional to 31,821.29, 43,908.50 and 18,389.95 is: 25,375.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,821.29 : 43,908.50 = 18,389.95 : x
  2. Step 2: Convert to fraction form
    31,821.29/43,908.50 = 18,389.95/x
  3. Step 3: Cross multiply
    31,821.29x = 43,908.50 × 18,389.95
  4. Step 4: Simplify right side
    31,821.29x = 807,475,052.87
  5. Step 5: Solve for x
    x = 807,475,052.87/31,821.29
  6. Step 6: Final answer
    x = 25,375.31

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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.