Home / 3,689.29-5,091.11-2,117.35

Finding the Fourth Proportional to 3,689.29, 5,091.11 and 2,117.35

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Solution

The fourth proportional to 3,689.29, 5,091.11 and 2,117.35 is: 2,921.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,689.29 : 5,091.11 = 2,117.35 : x
  2. Step 2: Convert to fraction form
    3,689.29/5,091.11 = 2,117.35/x
  3. Step 3: Cross multiply
    3,689.29x = 5,091.11 × 2,117.35
  4. Step 4: Simplify right side
    3,689.29x = 10,779,651.17
  5. Step 5: Solve for x
    x = 10,779,651.17/3,689.29
  6. Step 6: Final answer
    x = 2,921.88

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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.