Home / 31,178.20-43,040.07-19,863.21

Finding the Fourth Proportional to 31,178.20, 43,040.07 and 19,863.21

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Solution

The fourth proportional to 31,178.20, 43,040.07 and 19,863.21 is: 27,420.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,178.20 : 43,040.07 = 19,863.21 : x
  2. Step 2: Convert to fraction form
    31,178.20/43,040.07 = 19,863.21/x
  3. Step 3: Cross multiply
    31,178.20x = 43,040.07 × 19,863.21
  4. Step 4: Simplify right side
    31,178.20x = 854,913,733.62
  5. Step 5: Solve for x
    x = 854,913,733.62/31,178.20
  6. Step 6: Final answer
    x = 27,420.24

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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.