Home / 31,379.20-43,301.23-18,631.72

Finding the Fourth Proportional to 31,379.20, 43,301.23 and 18,631.72

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Solution

The fourth proportional to 31,379.20, 43,301.23 and 18,631.72 is: 25,710.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,379.20 : 43,301.23 = 18,631.72 : x
  2. Step 2: Convert to fraction form
    31,379.20/43,301.23 = 18,631.72/x
  3. Step 3: Cross multiply
    31,379.20x = 43,301.23 × 18,631.72
  4. Step 4: Simplify right side
    31,379.20x = 806,776,505.37
  5. Step 5: Solve for x
    x = 806,776,505.37/31,379.20
  6. Step 6: Final answer
    x = 25,710.55

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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.