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Finding the Fourth Proportional to 8,760.54, 13,142.53 and 3,213.93

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Solution

The fourth proportional to 8,760.54, 13,142.53 and 3,213.93 is: 4,821.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,760.54 : 13,142.53 = 3,213.93 : x
  2. Step 2: Convert to fraction form
    8,760.54/13,142.53 = 3,213.93/x
  3. Step 3: Cross multiply
    8,760.54x = 13,142.53 × 3,213.93
  4. Step 4: Simplify right side
    8,760.54x = 42,239,113.77
  5. Step 5: Solve for x
    x = 42,239,113.77/8,760.54
  6. Step 6: Final answer
    x = 4,821.52

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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.