Home / 11,431.89-15,775.43-6,396.12

Finding the Fourth Proportional to 11,431.89, 15,775.43 and 6,396.12

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Solution

The fourth proportional to 11,431.89, 15,775.43 and 6,396.12 is: 8,826.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,431.89 : 15,775.43 = 6,396.12 : x
  2. Step 2: Convert to fraction form
    11,431.89/15,775.43 = 6,396.12/x
  3. Step 3: Cross multiply
    11,431.89x = 15,775.43 × 6,396.12
  4. Step 4: Simplify right side
    11,431.89x = 100,901,511.35
  5. Step 5: Solve for x
    x = 100,901,511.35/11,431.89
  6. Step 6: Final answer
    x = 8,826.32

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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.