Home / 15,171.21-20,924.40-9,867.72

Finding the Fourth Proportional to 15,171.21, 20,924.40 and 9,867.72

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Solution

The fourth proportional to 15,171.21, 20,924.40 and 9,867.72 is: 13,609.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,171.21 : 20,924.40 = 9,867.72 : x
  2. Step 2: Convert to fraction form
    15,171.21/20,924.40 = 9,867.72/x
  3. Step 3: Cross multiply
    15,171.21x = 20,924.40 × 9,867.72
  4. Step 4: Simplify right side
    15,171.21x = 206,476,120.37
  5. Step 5: Solve for x
    x = 206,476,120.37/15,171.21
  6. Step 6: Final answer
    x = 13,609.73

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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.