Home / 2,931.45-4,394.11-2,109.28

Finding the Fourth Proportional to 2,931.45, 4,394.11 and 2,109.28

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Solution

The fourth proportional to 2,931.45, 4,394.11 and 2,109.28 is: 3,161.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.45 : 4,394.11 = 2,109.28 : x
  2. Step 2: Convert to fraction form
    2,931.45/4,394.11 = 2,109.28/x
  3. Step 3: Cross multiply
    2,931.45x = 4,394.11 × 2,109.28
  4. Step 4: Simplify right side
    2,931.45x = 9,268,392.08
  5. Step 5: Solve for x
    x = 9,268,392.08/2,931.45
  6. Step 6: Final answer
    x = 3,161.71

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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.