Home / 15,721.44-21,696.30-8,648.25

Finding the Fourth Proportional to 15,721.44, 21,696.30 and 8,648.25

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Solution

The fourth proportional to 15,721.44, 21,696.30 and 8,648.25 is: 11,934.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.44 : 21,696.30 = 8,648.25 : x
  2. Step 2: Convert to fraction form
    15,721.44/21,696.30 = 8,648.25/x
  3. Step 3: Cross multiply
    15,721.44x = 21,696.30 × 8,648.25
  4. Step 4: Simplify right side
    15,721.44x = 187,635,026.48
  5. Step 5: Solve for x
    x = 187,635,026.48/15,721.44
  6. Step 6: Final answer
    x = 11,934.98

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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.