Home / 8,121.91-11,208.32-4,764.78

Finding the Fourth Proportional to 8,121.91, 11,208.32 and 4,764.78

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Solution

The fourth proportional to 8,121.91, 11,208.32 and 4,764.78 is: 6,575.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.91 : 11,208.32 = 4,764.78 : x
  2. Step 2: Convert to fraction form
    8,121.91/11,208.32 = 4,764.78/x
  3. Step 3: Cross multiply
    8,121.91x = 11,208.32 × 4,764.78
  4. Step 4: Simplify right side
    8,121.91x = 53,405,142.89
  5. Step 5: Solve for x
    x = 53,405,142.89/8,121.91
  6. Step 6: Final answer
    x = 6,575.45

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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.