Home / 3,399.09-4,688.76-2,138.15

Finding the Fourth Proportional to 3,399.09, 4,688.76 and 2,138.15

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Solution

The fourth proportional to 3,399.09, 4,688.76 and 2,138.15 is: 2,949.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,399.09 : 4,688.76 = 2,138.15 : x
  2. Step 2: Convert to fraction form
    3,399.09/4,688.76 = 2,138.15/x
  3. Step 3: Cross multiply
    3,399.09x = 4,688.76 × 2,138.15
  4. Step 4: Simplify right side
    3,399.09x = 10,025,272.19
  5. Step 5: Solve for x
    x = 10,025,272.19/3,399.09
  6. Step 6: Final answer
    x = 2,949.40

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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.