Home / 20,776.36-31,163.48-7,627.72

Finding the Fourth Proportional to 20,776.36, 31,163.48 and 7,627.72

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Solution

The fourth proportional to 20,776.36, 31,163.48 and 7,627.72 is: 11,441.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.36 : 31,163.48 = 7,627.72 : x
  2. Step 2: Convert to fraction form
    20,776.36/31,163.48 = 7,627.72/x
  3. Step 3: Cross multiply
    20,776.36x = 31,163.48 × 7,627.72
  4. Step 4: Simplify right side
    20,776.36x = 237,706,299.67
  5. Step 5: Solve for x
    x = 237,706,299.67/20,776.36
  6. Step 6: Final answer
    x = 11,441.19

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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.