Home / 3,689.28-5,091.08-2,117.25

Finding the Fourth Proportional to 3,689.28, 5,091.08 and 2,117.25

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Solution

The fourth proportional to 3,689.28, 5,091.08 and 2,117.25 is: 2,921.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,689.28 : 5,091.08 = 2,117.25 : x
  2. Step 2: Convert to fraction form
    3,689.28/5,091.08 = 2,117.25/x
  3. Step 3: Cross multiply
    3,689.28x = 5,091.08 × 2,117.25
  4. Step 4: Simplify right side
    3,689.28x = 10,779,078.54
  5. Step 5: Solve for x
    x = 10,779,078.54/3,689.28
  6. Step 6: Final answer
    x = 2,921.73

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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.