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Finding the Fourth Proportional to 8,615.23, 12,920.11 and 3,349.89

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Solution

The fourth proportional to 8,615.23, 12,920.11 and 3,349.89 is: 5,023.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.23 : 12,920.11 = 3,349.89 : x
  2. Step 2: Convert to fraction form
    8,615.23/12,920.11 = 3,349.89/x
  3. Step 3: Cross multiply
    8,615.23x = 12,920.11 × 3,349.89
  4. Step 4: Simplify right side
    8,615.23x = 43,280,938.91
  5. Step 5: Solve for x
    x = 43,280,938.91/8,615.23
  6. Step 6: Final answer
    x = 5,023.77

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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.