Home / 3,689.20-5,090.52-2,116.99

Finding the Fourth Proportional to 3,689.20, 5,090.52 and 2,116.99

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Solution

The fourth proportional to 3,689.20, 5,090.52 and 2,116.99 is: 2,921.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,689.20 : 5,090.52 = 2,116.99 : x
  2. Step 2: Convert to fraction form
    3,689.20/5,090.52 = 2,116.99/x
  3. Step 3: Cross multiply
    3,689.20x = 5,090.52 × 2,116.99
  4. Step 4: Simplify right side
    3,689.20x = 10,776,579.93
  5. Step 5: Solve for x
    x = 10,776,579.93/3,689.20
  6. Step 6: Final answer
    x = 2,921.12

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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.