Home / 13,428.44-20,135.82-7,106.78

Finding the Fourth Proportional to 13,428.44, 20,135.82 and 7,106.78

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Solution

The fourth proportional to 13,428.44, 20,135.82 and 7,106.78 is: 10,656.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.44 : 20,135.82 = 7,106.78 : x
  2. Step 2: Convert to fraction form
    13,428.44/20,135.82 = 7,106.78/x
  3. Step 3: Cross multiply
    13,428.44x = 20,135.82 × 7,106.78
  4. Step 4: Simplify right side
    13,428.44x = 143,100,842.86
  5. Step 5: Solve for x
    x = 143,100,842.86/13,428.44
  6. Step 6: Final answer
    x = 10,656.55

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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.