Home / 12,665.22-18,997.11-3,430.50

Finding the Fourth Proportional to 12,665.22, 18,997.11 and 3,430.50

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Solution

The fourth proportional to 12,665.22, 18,997.11 and 3,430.50 is: 5,145.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,665.22 : 18,997.11 = 3,430.50 : x
  2. Step 2: Convert to fraction form
    12,665.22/18,997.11 = 3,430.50/x
  3. Step 3: Cross multiply
    12,665.22x = 18,997.11 × 3,430.50
  4. Step 4: Simplify right side
    12,665.22x = 65,169,585.86
  5. Step 5: Solve for x
    x = 65,169,585.86/12,665.22
  6. Step 6: Final answer
    x = 5,145.55

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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.