Home / 20,801.30-31,209.75-10,799.81

Finding the Fourth Proportional to 20,801.30, 31,209.75 and 10,799.81

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Solution

The fourth proportional to 20,801.30, 31,209.75 and 10,799.81 is: 16,203.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.30 : 31,209.75 = 10,799.81 : x
  2. Step 2: Convert to fraction form
    20,801.30/31,209.75 = 10,799.81/x
  3. Step 3: Cross multiply
    20,801.30x = 31,209.75 × 10,799.81
  4. Step 4: Simplify right side
    20,801.30x = 337,059,201.59
  5. Step 5: Solve for x
    x = 337,059,201.59/20,801.30
  6. Step 6: Final answer
    x = 16,203.75

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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.