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Finding the Fourth Proportional to 8,762.39, 13,143.51 and 2,188.53

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Solution

The fourth proportional to 8,762.39, 13,143.51 and 2,188.53 is: 3,282.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,762.39 : 13,143.51 = 2,188.53 : x
  2. Step 2: Convert to fraction form
    8,762.39/13,143.51 = 2,188.53/x
  3. Step 3: Cross multiply
    8,762.39x = 13,143.51 × 2,188.53
  4. Step 4: Simplify right side
    8,762.39x = 28,764,965.94
  5. Step 5: Solve for x
    x = 28,764,965.94/8,762.39
  6. Step 6: Final answer
    x = 3,282.78

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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.