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Finding the Fourth Proportional to 6,438.77, 8,882.89 and 3,918.86

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Solution

The fourth proportional to 6,438.77, 8,882.89 and 3,918.86 is: 5,406.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.77 : 8,882.89 = 3,918.86 : x
  2. Step 2: Convert to fraction form
    6,438.77/8,882.89 = 3,918.86/x
  3. Step 3: Cross multiply
    6,438.77x = 8,882.89 × 3,918.86
  4. Step 4: Simplify right side
    6,438.77x = 34,810,802.31
  5. Step 5: Solve for x
    x = 34,810,802.31/6,438.77
  6. Step 6: Final answer
    x = 5,406.44

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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.