Home / 20,004.22-29,989.30-12,218.50

Finding the Fourth Proportional to 20,004.22, 29,989.30 and 12,218.50

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Solution

The fourth proportional to 20,004.22, 29,989.30 and 12,218.50 is: 18,317.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,004.22 : 29,989.30 = 12,218.50 : x
  2. Step 2: Convert to fraction form
    20,004.22/29,989.30 = 12,218.50/x
  3. Step 3: Cross multiply
    20,004.22x = 29,989.30 × 12,218.50
  4. Step 4: Simplify right side
    20,004.22x = 366,424,262.05
  5. Step 5: Solve for x
    x = 366,424,262.05/20,004.22
  6. Step 6: Final answer
    x = 18,317.35

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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.