Home / 20,908.60-31,311.75-18,884.54

Finding the Fourth Proportional to 20,908.60, 31,311.75 and 18,884.54

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Solution

The fourth proportional to 20,908.60, 31,311.75 and 18,884.54 is: 28,280.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.60 : 31,311.75 = 18,884.54 : x
  2. Step 2: Convert to fraction form
    20,908.60/31,311.75 = 18,884.54/x
  3. Step 3: Cross multiply
    20,908.60x = 31,311.75 × 18,884.54
  4. Step 4: Simplify right side
    20,908.60x = 591,307,995.35
  5. Step 5: Solve for x
    x = 591,307,995.35/20,908.60
  6. Step 6: Final answer
    x = 28,280.61

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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.