Home / 3,178.53-4,387.91-2,118.06

Finding the Fourth Proportional to 3,178.53, 4,387.91 and 2,118.06

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Solution

The fourth proportional to 3,178.53, 4,387.91 and 2,118.06 is: 2,923.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.53 : 4,387.91 = 2,118.06 : x
  2. Step 2: Convert to fraction form
    3,178.53/4,387.91 = 2,118.06/x
  3. Step 3: Cross multiply
    3,178.53x = 4,387.91 × 2,118.06
  4. Step 4: Simplify right side
    3,178.53x = 9,293,846.06
  5. Step 5: Solve for x
    x = 9,293,846.06/3,178.53
  6. Step 6: Final answer
    x = 2,923.94

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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.