Home / 20,772.41-31,157.80-6,921.41

Finding the Fourth Proportional to 20,772.41, 31,157.80 and 6,921.41

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Solution

The fourth proportional to 20,772.41, 31,157.80 and 6,921.41 is: 10,381.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.41 : 31,157.80 = 6,921.41 : x
  2. Step 2: Convert to fraction form
    20,772.41/31,157.80 = 6,921.41/x
  3. Step 3: Cross multiply
    20,772.41x = 31,157.80 × 6,921.41
  4. Step 4: Simplify right side
    20,772.41x = 215,655,735.41
  5. Step 5: Solve for x
    x = 215,655,735.41/20,772.41
  6. Step 6: Final answer
    x = 10,381.84

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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.