Home / 6,660.78-9,991.44-2,278.68

Finding the Fourth Proportional to 6,660.78, 9,991.44 and 2,278.68

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Solution

The fourth proportional to 6,660.78, 9,991.44 and 2,278.68 is: 3,418.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,660.78 : 9,991.44 = 2,278.68 : x
  2. Step 2: Convert to fraction form
    6,660.78/9,991.44 = 2,278.68/x
  3. Step 3: Cross multiply
    6,660.78x = 9,991.44 × 2,278.68
  4. Step 4: Simplify right side
    6,660.78x = 22,767,294.50
  5. Step 5: Solve for x
    x = 22,767,294.50/6,660.78
  6. Step 6: Final answer
    x = 3,418.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.