Home / 3,678.30-5,517.45-2,117.70

Finding the Fourth Proportional to 3,678.30, 5,517.45 and 2,117.70

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Solution

The fourth proportional to 3,678.30, 5,517.45 and 2,117.70 is: 3,176.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.30 : 5,517.45 = 2,117.70 : x
  2. Step 2: Convert to fraction form
    3,678.30/5,517.45 = 2,117.70/x
  3. Step 3: Cross multiply
    3,678.30x = 5,517.45 × 2,117.70
  4. Step 4: Simplify right side
    3,678.30x = 11,684,303.87
  5. Step 5: Solve for x
    x = 11,684,303.87/3,678.30
  6. Step 6: Final answer
    x = 3,176.55

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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.