Home / 20,717.74-31,076.59-5,135.36

Finding the Fourth Proportional to 20,717.74, 31,076.59 and 5,135.36

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Solution

The fourth proportional to 20,717.74, 31,076.59 and 5,135.36 is: 7,703.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.74 : 31,076.59 = 5,135.36 : x
  2. Step 2: Convert to fraction form
    20,717.74/31,076.59 = 5,135.36/x
  3. Step 3: Cross multiply
    20,717.74x = 31,076.59 × 5,135.36
  4. Step 4: Simplify right side
    20,717.74x = 159,589,451.55
  5. Step 5: Solve for x
    x = 159,589,451.55/20,717.74
  6. Step 6: Final answer
    x = 7,703.04

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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.