Home / 20,731.05-31,090.80-5,734.56

Finding the Fourth Proportional to 20,731.05, 31,090.80 and 5,734.56

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Solution

The fourth proportional to 20,731.05, 31,090.80 and 5,734.56 is: 8,600.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.05 : 31,090.80 = 5,734.56 : x
  2. Step 2: Convert to fraction form
    20,731.05/31,090.80 = 5,734.56/x
  3. Step 3: Cross multiply
    20,731.05x = 31,090.80 × 5,734.56
  4. Step 4: Simplify right side
    20,731.05x = 178,292,058.05
  5. Step 5: Solve for x
    x = 178,292,058.05/20,731.05
  6. Step 6: Final answer
    x = 8,600.24

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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.