Home / 4,087.12-5,640.08-2,758.72

Finding the Fourth Proportional to 4,087.12, 5,640.08 and 2,758.72

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Solution

The fourth proportional to 4,087.12, 5,640.08 and 2,758.72 is: 3,806.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,087.12 : 5,640.08 = 2,758.72 : x
  2. Step 2: Convert to fraction form
    4,087.12/5,640.08 = 2,758.72/x
  3. Step 3: Cross multiply
    4,087.12x = 5,640.08 × 2,758.72
  4. Step 4: Simplify right side
    4,087.12x = 15,559,401.50
  5. Step 5: Solve for x
    x = 15,559,401.50/4,087.12
  6. Step 6: Final answer
    x = 3,806.94

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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.