Home / 15,765.44-21,756.41-8,691.87

Finding the Fourth Proportional to 15,765.44, 21,756.41 and 8,691.87

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Solution

The fourth proportional to 15,765.44, 21,756.41 and 8,691.87 is: 11,994.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,765.44 : 21,756.41 = 8,691.87 : x
  2. Step 2: Convert to fraction form
    15,765.44/21,756.41 = 8,691.87/x
  3. Step 3: Cross multiply
    15,765.44x = 21,756.41 × 8,691.87
  4. Step 4: Simplify right side
    15,765.44x = 189,103,843.93
  5. Step 5: Solve for x
    x = 189,103,843.93/15,765.44
  6. Step 6: Final answer
    x = 11,994.84

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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.