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Finding the Fourth Proportional to 8,293.72, 12,438.96 and 3,910

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Solution

The fourth proportional to 8,293.72, 12,438.96 and 3,910 is: 5,864.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,293.72 : 12,438.96 = 3,910 : x
  2. Step 2: Convert to fraction form
    8,293.72/12,438.96 = 3,910/x
  3. Step 3: Cross multiply
    8,293.72x = 12,438.96 × 3,910
  4. Step 4: Simplify right side
    8,293.72x = 48,636,333.60
  5. Step 5: Solve for x
    x = 48,636,333.60/8,293.72
  6. Step 6: Final answer
    x = 5,864.24

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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.