Home / 15,721.44-21,695.46-8,647.72

Finding the Fourth Proportional to 15,721.44, 21,695.46 and 8,647.72

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Solution

The fourth proportional to 15,721.44, 21,695.46 and 8,647.72 is: 11,933.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.44 : 21,695.46 = 8,647.72 : x
  2. Step 2: Convert to fraction form
    15,721.44/21,695.46 = 8,647.72/x
  3. Step 3: Cross multiply
    15,721.44x = 21,695.46 × 8,647.72
  4. Step 4: Simplify right side
    15,721.44x = 187,616,263.35
  5. Step 5: Solve for x
    x = 187,616,263.35/15,721.44
  6. Step 6: Final answer
    x = 11,933.78

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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.