Home / 3,609-4,981.74-2,118.16

Finding the Fourth Proportional to 3,609, 4,981.74 and 2,118.16

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Solution

The fourth proportional to 3,609, 4,981.74 and 2,118.16 is: 2,923.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,609 : 4,981.74 = 2,118.16 : x
  2. Step 2: Convert to fraction form
    3,609/4,981.74 = 2,118.16/x
  3. Step 3: Cross multiply
    3,609x = 4,981.74 × 2,118.16
  4. Step 4: Simplify right side
    3,609x = 10,552,120.68
  5. Step 5: Solve for x
    x = 10,552,120.68/3,609
  6. Step 6: Final answer
    x = 2,923.84

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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.