Home / 20,717.93-31,077.21-5,135.57

Finding the Fourth Proportional to 20,717.93, 31,077.21 and 5,135.57

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Solution

The fourth proportional to 20,717.93, 31,077.21 and 5,135.57 is: 7,703.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.93 : 31,077.21 = 5,135.57 : x
  2. Step 2: Convert to fraction form
    20,717.93/31,077.21 = 5,135.57/x
  3. Step 3: Cross multiply
    20,717.93x = 31,077.21 × 5,135.57
  4. Step 4: Simplify right side
    20,717.93x = 159,599,187.36
  5. Step 5: Solve for x
    x = 159,599,187.36/20,717.93
  6. Step 6: Final answer
    x = 7,703.43

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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.