Home / 31,422.18-43,356.07-18,679.87

Finding the Fourth Proportional to 31,422.18, 43,356.07 and 18,679.87

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Solution

The fourth proportional to 31,422.18, 43,356.07 and 18,679.87 is: 25,774.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,422.18 : 43,356.07 = 18,679.87 : x
  2. Step 2: Convert to fraction form
    31,422.18/43,356.07 = 18,679.87/x
  3. Step 3: Cross multiply
    31,422.18x = 43,356.07 × 18,679.87
  4. Step 4: Simplify right side
    31,422.18x = 809,885,751.31
  5. Step 5: Solve for x
    x = 809,885,751.31/31,422.18
  6. Step 6: Final answer
    x = 25,774.33

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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.