Home / 20,931.96-31,372.41-11,571.60

Finding the Fourth Proportional to 20,931.96, 31,372.41 and 11,571.60

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Solution

The fourth proportional to 20,931.96, 31,372.41 and 11,571.60 is: 17,343.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.96 : 31,372.41 = 11,571.60 : x
  2. Step 2: Convert to fraction form
    20,931.96/31,372.41 = 11,571.60/x
  3. Step 3: Cross multiply
    20,931.96x = 31,372.41 × 11,571.60
  4. Step 4: Simplify right side
    20,931.96x = 363,028,979.56
  5. Step 5: Solve for x
    x = 363,028,979.56/20,931.96
  6. Step 6: Final answer
    x = 17,343.29

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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.