Home / 21,091.16-31,640.38-8,617.96

Finding the Fourth Proportional to 21,091.16, 31,640.38 and 8,617.96

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Solution

The fourth proportional to 21,091.16, 31,640.38 and 8,617.96 is: 12,928.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.16 : 31,640.38 = 8,617.96 : x
  2. Step 2: Convert to fraction form
    21,091.16/31,640.38 = 8,617.96/x
  3. Step 3: Cross multiply
    21,091.16x = 31,640.38 × 8,617.96
  4. Step 4: Simplify right side
    21,091.16x = 272,675,529.22
  5. Step 5: Solve for x
    x = 272,675,529.22/21,091.16
  6. Step 6: Final answer
    x = 12,928.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.