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Finding the Fourth Proportional to 7,688.88, 11,532.87 and 2,142.54

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Solution

The fourth proportional to 7,688.88, 11,532.87 and 2,142.54 is: 3,213.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,688.88 : 11,532.87 = 2,142.54 : x
  2. Step 2: Convert to fraction form
    7,688.88/11,532.87 = 2,142.54/x
  3. Step 3: Cross multiply
    7,688.88x = 11,532.87 × 2,142.54
  4. Step 4: Simplify right side
    7,688.88x = 24,709,635.29
  5. Step 5: Solve for x
    x = 24,709,635.29/7,688.88
  6. Step 6: Final answer
    x = 3,213.68

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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.