Home / 21,660.62-29,891.79-12,708.32

Finding the Fourth Proportional to 21,660.62, 29,891.79 and 12,708.32

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Solution

The fourth proportional to 21,660.62, 29,891.79 and 12,708.32 is: 17,537.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.62 : 29,891.79 = 12,708.32 : x
  2. Step 2: Convert to fraction form
    21,660.62/29,891.79 = 12,708.32/x
  3. Step 3: Cross multiply
    21,660.62x = 29,891.79 × 12,708.32
  4. Step 4: Simplify right side
    21,660.62x = 379,874,432.69
  5. Step 5: Solve for x
    x = 379,874,432.69/21,660.62
  6. Step 6: Final answer
    x = 17,537.56

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1.5x scale

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.