Home / 3,689.60-5,091.36-2,117.36

Finding the Fourth Proportional to 3,689.60, 5,091.36 and 2,117.36

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Solution

The fourth proportional to 3,689.60, 5,091.36 and 2,117.36 is: 2,921.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,689.60 : 5,091.36 = 2,117.36 : x
  2. Step 2: Convert to fraction form
    3,689.60/5,091.36 = 2,117.36/x
  3. Step 3: Cross multiply
    3,689.60x = 5,091.36 × 2,117.36
  4. Step 4: Simplify right side
    3,689.60x = 10,780,242.01
  5. Step 5: Solve for x
    x = 10,780,242.01/3,689.60
  6. Step 6: Final answer
    x = 2,921.79

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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.