Home / 20,669.76-31,004.28-5,087.28

Finding the Fourth Proportional to 20,669.76, 31,004.28 and 5,087.28

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Solution

The fourth proportional to 20,669.76, 31,004.28 and 5,087.28 is: 7,630.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.76 : 31,004.28 = 5,087.28 : x
  2. Step 2: Convert to fraction form
    20,669.76/31,004.28 = 5,087.28/x
  3. Step 3: Cross multiply
    20,669.76x = 31,004.28 × 5,087.28
  4. Step 4: Simplify right side
    20,669.76x = 157,727,453.56
  5. Step 5: Solve for x
    x = 157,727,453.56/20,669.76
  6. Step 6: Final answer
    x = 7,630.83

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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.