Home / 11,431.86-15,775.10-6,395.15

Finding the Fourth Proportional to 11,431.86, 15,775.10 and 6,395.15

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Solution

The fourth proportional to 11,431.86, 15,775.10 and 6,395.15 is: 8,824.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,431.86 : 15,775.10 = 6,395.15 : x
  2. Step 2: Convert to fraction form
    11,431.86/15,775.10 = 6,395.15/x
  3. Step 3: Cross multiply
    11,431.86x = 15,775.10 × 6,395.15
  4. Step 4: Simplify right side
    11,431.86x = 100,884,198.18
  5. Step 5: Solve for x
    x = 100,884,198.18/11,431.86
  6. Step 6: Final answer
    x = 8,824.83

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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.