Home / 4,087.12-5,636.64-2,689.60

Finding the Fourth Proportional to 4,087.12, 5,636.64 and 2,689.60

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Solution

The fourth proportional to 4,087.12, 5,636.64 and 2,689.60 is: 3,709.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,087.12 : 5,636.64 = 2,689.60 : x
  2. Step 2: Convert to fraction form
    4,087.12/5,636.64 = 2,689.60/x
  3. Step 3: Cross multiply
    4,087.12x = 5,636.64 × 2,689.60
  4. Step 4: Simplify right side
    4,087.12x = 15,160,306.94
  5. Step 5: Solve for x
    x = 15,160,306.94/4,087.12
  6. Step 6: Final answer
    x = 3,709.29

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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.