Home / 21,163.52-31,751.85-8,684.55

Finding the Fourth Proportional to 21,163.52, 31,751.85 and 8,684.55

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Solution

The fourth proportional to 21,163.52, 31,751.85 and 8,684.55 is: 13,029.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.52 : 31,751.85 = 8,684.55 : x
  2. Step 2: Convert to fraction form
    21,163.52/31,751.85 = 8,684.55/x
  3. Step 3: Cross multiply
    21,163.52x = 31,751.85 × 8,684.55
  4. Step 4: Simplify right side
    21,163.52x = 275,750,528.92
  5. Step 5: Solve for x
    x = 275,750,528.92/21,163.52
  6. Step 6: Final answer
    x = 13,029.52

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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.