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Finding the Fourth Proportional to 8,577.61, 12,859.02 and 3,316.31

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Solution

The fourth proportional to 8,577.61, 12,859.02 and 3,316.31 is: 4,971.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,577.61 : 12,859.02 = 3,316.31 : x
  2. Step 2: Convert to fraction form
    8,577.61/12,859.02 = 3,316.31/x
  3. Step 3: Cross multiply
    8,577.61x = 12,859.02 × 3,316.31
  4. Step 4: Simplify right side
    8,577.61x = 42,644,496.62
  5. Step 5: Solve for x
    x = 42,644,496.62/8,577.61
  6. Step 6: Final answer
    x = 4,971.61

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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.