Home / 31,679.82-43,710.78-18,937.13

Finding the Fourth Proportional to 31,679.82, 43,710.78 and 18,937.13

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Solution

The fourth proportional to 31,679.82, 43,710.78 and 18,937.13 is: 26,128.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,679.82 : 43,710.78 = 18,937.13 : x
  2. Step 2: Convert to fraction form
    31,679.82/43,710.78 = 18,937.13/x
  3. Step 3: Cross multiply
    31,679.82x = 43,710.78 × 18,937.13
  4. Step 4: Simplify right side
    31,679.82x = 827,756,575.72
  5. Step 5: Solve for x
    x = 827,756,575.72/31,679.82
  6. Step 6: Final answer
    x = 26,128.83

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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.