Home / 31,387.80-43,312.41-18,640.02

Finding the Fourth Proportional to 31,387.80, 43,312.41 and 18,640.02

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Solution

The fourth proportional to 31,387.80, 43,312.41 and 18,640.02 is: 25,721.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,387.80 : 43,312.41 = 18,640.02 : x
  2. Step 2: Convert to fraction form
    31,387.80/43,312.41 = 18,640.02/x
  3. Step 3: Cross multiply
    31,387.80x = 43,312.41 × 18,640.02
  4. Step 4: Simplify right side
    31,387.80x = 807,344,188.65
  5. Step 5: Solve for x
    x = 807,344,188.65/31,387.80
  6. Step 6: Final answer
    x = 25,721.59

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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.