Home / 20,750.92-31,135.50-10,887.87

Finding the Fourth Proportional to 20,750.92, 31,135.50 and 10,887.87

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Solution

The fourth proportional to 20,750.92, 31,135.50 and 10,887.87 is: 16,336.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.92 : 31,135.50 = 10,887.87 : x
  2. Step 2: Convert to fraction form
    20,750.92/31,135.50 = 10,887.87/x
  3. Step 3: Cross multiply
    20,750.92x = 31,135.50 × 10,887.87
  4. Step 4: Simplify right side
    20,750.92x = 338,999,393.14
  5. Step 5: Solve for x
    x = 338,999,393.14/20,750.92
  6. Step 6: Final answer
    x = 16,336.60

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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.