Home / 6,686.86-9,231.21-4,330.90

Finding the Fourth Proportional to 6,686.86, 9,231.21 and 4,330.90

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Solution

The fourth proportional to 6,686.86, 9,231.21 and 4,330.90 is: 5,978.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,686.86 : 9,231.21 = 4,330.90 : x
  2. Step 2: Convert to fraction form
    6,686.86/9,231.21 = 4,330.90/x
  3. Step 3: Cross multiply
    6,686.86x = 9,231.21 × 4,330.90
  4. Step 4: Simplify right side
    6,686.86x = 39,979,447.39
  5. Step 5: Solve for x
    x = 39,979,447.39/6,686.86
  6. Step 6: Final answer
    x = 5,978.81

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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.