Home / 15,764.92-21,756.57-8,691.33

Finding the Fourth Proportional to 15,764.92, 21,756.57 and 8,691.33

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Solution

The fourth proportional to 15,764.92, 21,756.57 and 8,691.33 is: 11,994.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,764.92 : 21,756.57 = 8,691.33 : x
  2. Step 2: Convert to fraction form
    15,764.92/21,756.57 = 8,691.33/x
  3. Step 3: Cross multiply
    15,764.92x = 21,756.57 × 8,691.33
  4. Step 4: Simplify right side
    15,764.92x = 189,093,529.54
  5. Step 5: Solve for x
    x = 189,093,529.54/15,764.92
  6. Step 6: Final answer
    x = 11,994.58

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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.