Home / 20,914.97-31,369.68-7,765.56

Finding the Fourth Proportional to 20,914.97, 31,369.68 and 7,765.56

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Solution

The fourth proportional to 20,914.97, 31,369.68 and 7,765.56 is: 11,647.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.97 : 31,369.68 = 7,765.56 : x
  2. Step 2: Convert to fraction form
    20,914.97/31,369.68 = 7,765.56/x
  3. Step 3: Cross multiply
    20,914.97x = 31,369.68 × 7,765.56
  4. Step 4: Simplify right side
    20,914.97x = 243,603,132.22
  5. Step 5: Solve for x
    x = 243,603,132.22/20,914.97
  6. Step 6: Final answer
    x = 11,647.31

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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.