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Finding the Fourth Proportional to 6,435.86, 8,882.87 and 3,918.80

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Solution

The fourth proportional to 6,435.86, 8,882.87 and 3,918.80 is: 5,408.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,435.86 : 8,882.87 = 3,918.80 : x
  2. Step 2: Convert to fraction form
    6,435.86/8,882.87 = 3,918.80/x
  3. Step 3: Cross multiply
    6,435.86x = 8,882.87 × 3,918.80
  4. Step 4: Simplify right side
    6,435.86x = 34,810,126.95
  5. Step 5: Solve for x
    x = 34,810,126.95/6,435.86
  6. Step 6: Final answer
    x = 5,408.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.