Home / 15,721.43-21,694.38-8,648.30

Finding the Fourth Proportional to 15,721.43, 21,694.38 and 8,648.30

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Solution

The fourth proportional to 15,721.43, 21,694.38 and 8,648.30 is: 11,934.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.43 : 21,694.38 = 8,648.30 : x
  2. Step 2: Convert to fraction form
    15,721.43/21,694.38 = 8,648.30/x
  3. Step 3: Cross multiply
    15,721.43x = 21,694.38 × 8,648.30
  4. Step 4: Simplify right side
    15,721.43x = 187,619,577.01
  5. Step 5: Solve for x
    x = 187,619,577.01/15,721.43
  6. Step 6: Final answer
    x = 11,934.01

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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.