Home / 31,883.94-43,969.26-21,111.72

Finding the Fourth Proportional to 31,883.94, 43,969.26 and 21,111.72

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Solution

The fourth proportional to 31,883.94, 43,969.26 and 21,111.72 is: 29,113.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,883.94 : 43,969.26 = 21,111.72 : x
  2. Step 2: Convert to fraction form
    31,883.94/43,969.26 = 21,111.72/x
  3. Step 3: Cross multiply
    31,883.94x = 43,969.26 × 21,111.72
  4. Step 4: Simplify right side
    31,883.94x = 928,266,705.73
  5. Step 5: Solve for x
    x = 928,266,705.73/31,883.94
  6. Step 6: Final answer
    x = 29,113.93

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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.