Home / 13,422.56-20,139.84-6,845.28

Finding the Fourth Proportional to 13,422.56, 20,139.84 and 6,845.28

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Solution

The fourth proportional to 13,422.56, 20,139.84 and 6,845.28 is: 10,270.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,422.56 : 20,139.84 = 6,845.28 : x
  2. Step 2: Convert to fraction form
    13,422.56/20,139.84 = 6,845.28/x
  3. Step 3: Cross multiply
    13,422.56x = 20,139.84 × 6,845.28
  4. Step 4: Simplify right side
    13,422.56x = 137,862,843.96
  5. Step 5: Solve for x
    x = 137,862,843.96/13,422.56
  6. Step 6: Final answer
    x = 10,270.98

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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.