Home / 15,768.78-21,759.92-8,695.26

Finding the Fourth Proportional to 15,768.78, 21,759.92 and 8,695.26

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Solution

The fourth proportional to 15,768.78, 21,759.92 and 8,695.26 is: 11,998.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,768.78 : 21,759.92 = 8,695.26 : x
  2. Step 2: Convert to fraction form
    15,768.78/21,759.92 = 8,695.26/x
  3. Step 3: Cross multiply
    15,768.78x = 21,759.92 × 8,695.26
  4. Step 4: Simplify right side
    15,768.78x = 189,208,161.98
  5. Step 5: Solve for x
    x = 189,208,161.98/15,768.78
  6. Step 6: Final answer
    x = 11,998.91

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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.