Home / 20,717.49-31,076.21-5,135.11

Finding the Fourth Proportional to 20,717.49, 31,076.21 and 5,135.11

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Solution

The fourth proportional to 20,717.49, 31,076.21 and 5,135.11 is: 7,702.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.49 : 31,076.21 = 5,135.11 : x
  2. Step 2: Convert to fraction form
    20,717.49/31,076.21 = 5,135.11/x
  3. Step 3: Cross multiply
    20,717.49x = 31,076.21 × 5,135.11
  4. Step 4: Simplify right side
    20,717.49x = 159,579,756.73
  5. Step 5: Solve for x
    x = 159,579,756.73/20,717.49
  6. Step 6: Final answer
    x = 7,702.66

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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.