Home / 6,678.54-9,219.35-3,990.71

Finding the Fourth Proportional to 6,678.54, 9,219.35 and 3,990.71

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Solution

The fourth proportional to 6,678.54, 9,219.35 and 3,990.71 is: 5,508.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,678.54 : 9,219.35 = 3,990.71 : x
  2. Step 2: Convert to fraction form
    6,678.54/9,219.35 = 3,990.71/x
  3. Step 3: Cross multiply
    6,678.54x = 9,219.35 × 3,990.71
  4. Step 4: Simplify right side
    6,678.54x = 36,791,755.33
  5. Step 5: Solve for x
    x = 36,791,755.33/6,678.54
  6. Step 6: Final answer
    x = 5,508.95

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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.