Home / 20,907.08-31,351.50-6,115.66

Finding the Fourth Proportional to 20,907.08, 31,351.50 and 6,115.66

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Solution

The fourth proportional to 20,907.08, 31,351.50 and 6,115.66 is: 9,170.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.08 : 31,351.50 = 6,115.66 : x
  2. Step 2: Convert to fraction form
    20,907.08/31,351.50 = 6,115.66/x
  3. Step 3: Cross multiply
    20,907.08x = 31,351.50 × 6,115.66
  4. Step 4: Simplify right side
    20,907.08x = 191,735,114.49
  5. Step 5: Solve for x
    x = 191,735,114.49/20,907.08
  6. Step 6: Final answer
    x = 9,170.82

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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.