Home / 31,790.16-43,870.05-18,361.37

Finding the Fourth Proportional to 31,790.16, 43,870.05 and 18,361.37

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Solution

The fourth proportional to 31,790.16, 43,870.05 and 18,361.37 is: 25,338.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,790.16 : 43,870.05 = 18,361.37 : x
  2. Step 2: Convert to fraction form
    31,790.16/43,870.05 = 18,361.37/x
  3. Step 3: Cross multiply
    31,790.16x = 43,870.05 × 18,361.37
  4. Step 4: Simplify right side
    31,790.16x = 805,514,000.62
  5. Step 5: Solve for x
    x = 805,514,000.62/31,790.16
  6. Step 6: Final answer
    x = 25,338.47

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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.