Home / 15,765.42-21,757.26-8,691.83

Finding the Fourth Proportional to 15,765.42, 21,757.26 and 8,691.83

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Solution

The fourth proportional to 15,765.42, 21,757.26 and 8,691.83 is: 11,995.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,765.42 : 21,757.26 = 8,691.83 : x
  2. Step 2: Convert to fraction form
    15,765.42/21,757.26 = 8,691.83/x
  3. Step 3: Cross multiply
    15,765.42x = 21,757.26 × 8,691.83
  4. Step 4: Simplify right side
    15,765.42x = 189,110,405.19
  5. Step 5: Solve for x
    x = 189,110,405.19/15,765.42
  6. Step 6: Final answer
    x = 11,995.27

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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.