Home / 6,438.27-8,882.21-3,918.36

Finding the Fourth Proportional to 6,438.27, 8,882.21 and 3,918.36

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Solution

The fourth proportional to 6,438.27, 8,882.21 and 3,918.36 is: 5,405.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.27 : 8,882.21 = 3,918.36 : x
  2. Step 2: Convert to fraction form
    6,438.27/8,882.21 = 3,918.36/x
  3. Step 3: Cross multiply
    6,438.27x = 8,882.21 × 3,918.36
  4. Step 4: Simplify right side
    6,438.27x = 34,803,676.78
  5. Step 5: Solve for x
    x = 34,803,676.78/6,438.27
  6. Step 6: Final answer
    x = 5,405.75

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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.