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Finding the Fourth Proportional to 8,063.79, 12,102.29 and 7,129.31

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Solution

The fourth proportional to 8,063.79, 12,102.29 and 7,129.31 is: 10,699.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,063.79 : 12,102.29 = 7,129.31 : x
  2. Step 2: Convert to fraction form
    8,063.79/12,102.29 = 7,129.31/x
  3. Step 3: Cross multiply
    8,063.79x = 12,102.29 × 7,129.31
  4. Step 4: Simplify right side
    8,063.79x = 86,280,880.96
  5. Step 5: Solve for x
    x = 86,280,880.96/8,063.79
  6. Step 6: Final answer
    x = 10,699.79

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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.