Home / 20,930.27-31,395.47-5,135.38

Finding the Fourth Proportional to 20,930.27, 31,395.47 and 5,135.38

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Solution

The fourth proportional to 20,930.27, 31,395.47 and 5,135.38 is: 7,703.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.27 : 31,395.47 = 5,135.38 : x
  2. Step 2: Convert to fraction form
    20,930.27/31,395.47 = 5,135.38/x
  3. Step 3: Cross multiply
    20,930.27x = 31,395.47 × 5,135.38
  4. Step 4: Simplify right side
    20,930.27x = 161,227,564.56
  5. Step 5: Solve for x
    x = 161,227,564.56/20,930.27
  6. Step 6: Final answer
    x = 7,703.08

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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.