Home / 31,617.23-43,640.85-20,869.94

Finding the Fourth Proportional to 31,617.23, 43,640.85 and 20,869.94

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Solution

The fourth proportional to 31,617.23, 43,640.85 and 20,869.94 is: 28,806.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,617.23 : 43,640.85 = 20,869.94 : x
  2. Step 2: Convert to fraction form
    31,617.23/43,640.85 = 20,869.94/x
  3. Step 3: Cross multiply
    31,617.23x = 43,640.85 × 20,869.94
  4. Step 4: Simplify right side
    31,617.23x = 910,781,702.84
  5. Step 5: Solve for x
    x = 910,781,702.84/31,617.23
  6. Step 6: Final answer
    x = 28,806.50

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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.