Home / 20,717.43-31,076.46-5,135.07

Finding the Fourth Proportional to 20,717.43, 31,076.46 and 5,135.07

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Solution

The fourth proportional to 20,717.43, 31,076.46 and 5,135.07 is: 7,702.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.43 : 31,076.46 = 5,135.07 : x
  2. Step 2: Convert to fraction form
    20,717.43/31,076.46 = 5,135.07/x
  3. Step 3: Cross multiply
    20,717.43x = 31,076.46 × 5,135.07
  4. Step 4: Simplify right side
    20,717.43x = 159,579,797.45
  5. Step 5: Solve for x
    x = 159,579,797.45/20,717.43
  6. Step 6: Final answer
    x = 7,702.68

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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.