Home / 15,768.20-21,759.76-8,694.64

Finding the Fourth Proportional to 15,768.20, 21,759.76 and 8,694.64

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Solution

The fourth proportional to 15,768.20, 21,759.76 and 8,694.64 is: 11,998.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,768.20 : 21,759.76 = 8,694.64 : x
  2. Step 2: Convert to fraction form
    15,768.20/21,759.76 = 8,694.64/x
  3. Step 3: Cross multiply
    15,768.20x = 21,759.76 × 8,694.64
  4. Step 4: Simplify right side
    15,768.20x = 189,193,279.69
  5. Step 5: Solve for x
    x = 189,193,279.69/15,768.20
  6. Step 6: Final answer
    x = 11,998.41

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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.