Home / 20,761.45-31,142.07-5,179.07

Finding the Fourth Proportional to 20,761.45, 31,142.07 and 5,179.07

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Solution

The fourth proportional to 20,761.45, 31,142.07 and 5,179.07 is: 7,768.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.45 : 31,142.07 = 5,179.07 : x
  2. Step 2: Convert to fraction form
    20,761.45/31,142.07 = 5,179.07/x
  3. Step 3: Cross multiply
    20,761.45x = 31,142.07 × 5,179.07
  4. Step 4: Simplify right side
    20,761.45x = 161,287,038.33
  5. Step 5: Solve for x
    x = 161,287,038.33/20,761.45
  6. Step 6: Final answer
    x = 7,768.58

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1.5x scale

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.