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Finding the Fourth Proportional to 7,681.79, 11,524.50 and 2,487.67

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Solution

The fourth proportional to 7,681.79, 11,524.50 and 2,487.67 is: 3,732.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,681.79 : 11,524.50 = 2,487.67 : x
  2. Step 2: Convert to fraction form
    7,681.79/11,524.50 = 2,487.67/x
  3. Step 3: Cross multiply
    7,681.79x = 11,524.50 × 2,487.67
  4. Step 4: Simplify right side
    7,681.79x = 28,669,124.10
  5. Step 5: Solve for x
    x = 28,669,124.10/7,681.79
  6. Step 6: Final answer
    x = 3,732.09

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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.