Home / 6,431.38-8,876.79-4,189.35

Finding the Fourth Proportional to 6,431.38, 8,876.79 and 4,189.35

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Solution

The fourth proportional to 6,431.38, 8,876.79 and 4,189.35 is: 5,782.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.38 : 8,876.79 = 4,189.35 : x
  2. Step 2: Convert to fraction form
    6,431.38/8,876.79 = 4,189.35/x
  3. Step 3: Cross multiply
    6,431.38x = 8,876.79 × 4,189.35
  4. Step 4: Simplify right side
    6,431.38x = 37,188,013.47
  5. Step 5: Solve for x
    x = 37,188,013.47/6,431.38
  6. Step 6: Final answer
    x = 5,782.27

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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.