Home / 21,091.92-31,622.12-12,769.94

Finding the Fourth Proportional to 21,091.92, 31,622.12 and 12,769.94

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Solution

The fourth proportional to 21,091.92, 31,622.12 and 12,769.94 is: 19,145.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.92 : 31,622.12 = 12,769.94 : x
  2. Step 2: Convert to fraction form
    21,091.92/31,622.12 = 12,769.94/x
  3. Step 3: Cross multiply
    21,091.92x = 31,622.12 × 12,769.94
  4. Step 4: Simplify right side
    21,091.92x = 403,812,353.11
  5. Step 5: Solve for x
    x = 403,812,353.11/21,091.92
  6. Step 6: Final answer
    x = 19,145.36

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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.