Home / 20,717.80-31,076.67-5,135.43

Finding the Fourth Proportional to 20,717.80, 31,076.67 and 5,135.43

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Solution

The fourth proportional to 20,717.80, 31,076.67 and 5,135.43 is: 7,703.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.80 : 31,076.67 = 5,135.43 : x
  2. Step 2: Convert to fraction form
    20,717.80/31,076.67 = 5,135.43/x
  3. Step 3: Cross multiply
    20,717.80x = 31,076.67 × 5,135.43
  4. Step 4: Simplify right side
    20,717.80x = 159,592,063.42
  5. Step 5: Solve for x
    x = 159,592,063.42/20,717.80
  6. Step 6: Final answer
    x = 7,703.14

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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.