Home / 11,212.80-16,819.20-3,421.68

Finding the Fourth Proportional to 11,212.80, 16,819.20 and 3,421.68

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Solution

The fourth proportional to 11,212.80, 16,819.20 and 3,421.68 is: 5,132.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,212.80 : 16,819.20 = 3,421.68 : x
  2. Step 2: Convert to fraction form
    11,212.80/16,819.20 = 3,421.68/x
  3. Step 3: Cross multiply
    11,212.80x = 16,819.20 × 3,421.68
  4. Step 4: Simplify right side
    11,212.80x = 57,549,920.26
  5. Step 5: Solve for x
    x = 57,549,920.26/11,212.80
  6. Step 6: Final answer
    x = 5,132.52

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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.