Home / 21,711.87-29,956.68-12,511.16

Finding the Fourth Proportional to 21,711.87, 29,956.68 and 12,511.16

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Solution

The fourth proportional to 21,711.87, 29,956.68 and 12,511.16 is: 17,262.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,711.87 : 29,956.68 = 12,511.16 : x
  2. Step 2: Convert to fraction form
    21,711.87/29,956.68 = 12,511.16/x
  3. Step 3: Cross multiply
    21,711.87x = 29,956.68 × 12,511.16
  4. Step 4: Simplify right side
    21,711.87x = 374,792,604.21
  5. Step 5: Solve for x
    x = 374,792,604.21/21,711.87
  6. Step 6: Final answer
    x = 17,262.11

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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.