Home / 21,635.24-32,446.38-7,781

Finding the Fourth Proportional to 21,635.24, 32,446.38 and 7,781

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Solution

The fourth proportional to 21,635.24, 32,446.38 and 7,781 is: 11,669.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,635.24 : 32,446.38 = 7,781 : x
  2. Step 2: Convert to fraction form
    21,635.24/32,446.38 = 7,781/x
  3. Step 3: Cross multiply
    21,635.24x = 32,446.38 × 7,781
  4. Step 4: Simplify right side
    21,635.24x = 252,465,282.78
  5. Step 5: Solve for x
    x = 252,465,282.78/21,635.24
  6. Step 6: Final answer
    x = 11,669.17

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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.