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Finding the Fourth Proportional to 8,615.26, 12,920.05 and 3,349.90

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Solution

The fourth proportional to 8,615.26, 12,920.05 and 3,349.90 is: 5,023.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.26 : 12,920.05 = 3,349.90 : x
  2. Step 2: Convert to fraction form
    8,615.26/12,920.05 = 3,349.90/x
  3. Step 3: Cross multiply
    8,615.26x = 12,920.05 × 3,349.90
  4. Step 4: Simplify right side
    8,615.26x = 43,280,875.50
  5. Step 5: Solve for x
    x = 43,280,875.50/8,615.26
  6. Step 6: Final answer
    x = 5,023.75

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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.