Home / 3,690.32-5,091.19-2,117.57

Finding the Fourth Proportional to 3,690.32, 5,091.19 and 2,117.57

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Solution

The fourth proportional to 3,690.32, 5,091.19 and 2,117.57 is: 2,921.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,690.32 : 5,091.19 = 2,117.57 : x
  2. Step 2: Convert to fraction form
    3,690.32/5,091.19 = 2,117.57/x
  3. Step 3: Cross multiply
    3,690.32x = 5,091.19 × 2,117.57
  4. Step 4: Simplify right side
    3,690.32x = 10,780,920.46
  5. Step 5: Solve for x
    x = 10,780,920.46/3,690.32
  6. Step 6: Final answer
    x = 2,921.41

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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.