Home / 8,659.25-12,985.68-3,111.11

Finding the Fourth Proportional to 8,659.25, 12,985.68 and 3,111.11

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Solution

The fourth proportional to 8,659.25, 12,985.68 and 3,111.11 is: 4,665.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.25 : 12,985.68 = 3,111.11 : x
  2. Step 2: Convert to fraction form
    8,659.25/12,985.68 = 3,111.11/x
  3. Step 3: Cross multiply
    8,659.25x = 12,985.68 × 3,111.11
  4. Step 4: Simplify right side
    8,659.25x = 40,399,874.34
  5. Step 5: Solve for x
    x = 40,399,874.34/8,659.25
  6. Step 6: Final answer
    x = 4,665.52

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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.