Home / 11,212.09-16,820.55-3,420.70

Finding the Fourth Proportional to 11,212.09, 16,820.55 and 3,420.70

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Solution

The fourth proportional to 11,212.09, 16,820.55 and 3,420.70 is: 5,131.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,212.09 : 16,820.55 = 3,420.70 : x
  2. Step 2: Convert to fraction form
    11,212.09/16,820.55 = 3,420.70/x
  3. Step 3: Cross multiply
    11,212.09x = 16,820.55 × 3,420.70
  4. Step 4: Simplify right side
    11,212.09x = 57,538,055.39
  5. Step 5: Solve for x
    x = 57,538,055.39/11,212.09
  6. Step 6: Final answer
    x = 5,131.79

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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.