Home / 31,398.39-43,297.18-21,849.09

Finding the Fourth Proportional to 31,398.39, 43,297.18 and 21,849.09

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Solution

The fourth proportional to 31,398.39, 43,297.18 and 21,849.09 is: 30,129.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,398.39 : 43,297.18 = 21,849.09 : x
  2. Step 2: Convert to fraction form
    31,398.39/43,297.18 = 21,849.09/x
  3. Step 3: Cross multiply
    31,398.39x = 43,297.18 × 21,849.09
  4. Step 4: Simplify right side
    31,398.39x = 946,003,982.57
  5. Step 5: Solve for x
    x = 946,003,982.57/31,398.39
  6. Step 6: Final answer
    x = 30,129.06

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1.5x scale

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.