Home / 8,178.66-11,286.89-4,642.20

Finding the Fourth Proportional to 8,178.66, 11,286.89 and 4,642.20

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Solution

The fourth proportional to 8,178.66, 11,286.89 and 4,642.20 is: 6,406.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,178.66 : 11,286.89 = 4,642.20 : x
  2. Step 2: Convert to fraction form
    8,178.66/11,286.89 = 4,642.20/x
  3. Step 3: Cross multiply
    8,178.66x = 11,286.89 × 4,642.20
  4. Step 4: Simplify right side
    8,178.66x = 52,395,944.32
  5. Step 5: Solve for x
    x = 52,395,944.32/8,178.66
  6. Step 6: Final answer
    x = 6,406.43

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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.