Home / 11,212.28-16,820.94-3,421.72

Finding the Fourth Proportional to 11,212.28, 16,820.94 and 3,421.72

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Solution

The fourth proportional to 11,212.28, 16,820.94 and 3,421.72 is: 5,133.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,212.28 : 16,820.94 = 3,421.72 : x
  2. Step 2: Convert to fraction form
    11,212.28/16,820.94 = 3,421.72/x
  3. Step 3: Cross multiply
    11,212.28x = 16,820.94 × 3,421.72
  4. Step 4: Simplify right side
    11,212.28x = 57,556,546.82
  5. Step 5: Solve for x
    x = 57,556,546.82/11,212.28
  6. Step 6: Final answer
    x = 5,133.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.