Home / 13,422.80-20,112.60-6,839.12

Finding the Fourth Proportional to 13,422.80, 20,112.60 and 6,839.12

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Solution

The fourth proportional to 13,422.80, 20,112.60 and 6,839.12 is: 10,247.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,422.80 : 20,112.60 = 6,839.12 : x
  2. Step 2: Convert to fraction form
    13,422.80/20,112.60 = 6,839.12/x
  3. Step 3: Cross multiply
    13,422.80x = 20,112.60 × 6,839.12
  4. Step 4: Simplify right side
    13,422.80x = 137,552,484.91
  5. Step 5: Solve for x
    x = 137,552,484.91/13,422.80
  6. Step 6: Final answer
    x = 10,247.67

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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.