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Finding the Fourth Proportional to 8,685.17, 13,028.21 and 2,762.49

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Solution

The fourth proportional to 8,685.17, 13,028.21 and 2,762.49 is: 4,143.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.17 : 13,028.21 = 2,762.49 : x
  2. Step 2: Convert to fraction form
    8,685.17/13,028.21 = 2,762.49/x
  3. Step 3: Cross multiply
    8,685.17x = 13,028.21 × 2,762.49
  4. Step 4: Simplify right side
    8,685.17x = 35,990,286.03
  5. Step 5: Solve for x
    x = 35,990,286.03/8,685.17
  6. Step 6: Final answer
    x = 4,143.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.