Home / 20,897.75-31,350.49-6,858.57

Finding the Fourth Proportional to 20,897.75, 31,350.49 and 6,858.57

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Solution

The fourth proportional to 20,897.75, 31,350.49 and 6,858.57 is: 10,289.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.75 : 31,350.49 = 6,858.57 : x
  2. Step 2: Convert to fraction form
    20,897.75/31,350.49 = 6,858.57/x
  3. Step 3: Cross multiply
    20,897.75x = 31,350.49 × 6,858.57
  4. Step 4: Simplify right side
    20,897.75x = 215,019,669.20
  5. Step 5: Solve for x
    x = 215,019,669.20/20,897.75
  6. Step 6: Final answer
    x = 10,289.13

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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.