Home / 7,964.35-10,991.38-4,777.78

Finding the Fourth Proportional to 7,964.35, 10,991.38 and 4,777.78

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Solution

The fourth proportional to 7,964.35, 10,991.38 and 4,777.78 is: 6,593.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,964.35 : 10,991.38 = 4,777.78 : x
  2. Step 2: Convert to fraction form
    7,964.35/10,991.38 = 4,777.78/x
  3. Step 3: Cross multiply
    7,964.35x = 10,991.38 × 4,777.78
  4. Step 4: Simplify right side
    7,964.35x = 52,514,395.54
  5. Step 5: Solve for x
    x = 52,514,395.54/7,964.35
  6. Step 6: Final answer
    x = 6,593.68

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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.