Home / 20,800.18-31,173.06-18,161.02

Finding the Fourth Proportional to 20,800.18, 31,173.06 and 18,161.02

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Solution

The fourth proportional to 20,800.18, 31,173.06 and 18,161.02 is: 27,217.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.18 : 31,173.06 = 18,161.02 : x
  2. Step 2: Convert to fraction form
    20,800.18/31,173.06 = 18,161.02/x
  3. Step 3: Cross multiply
    20,800.18x = 31,173.06 × 18,161.02
  4. Step 4: Simplify right side
    20,800.18x = 566,134,566.12
  5. Step 5: Solve for x
    x = 566,134,566.12/20,800.18
  6. Step 6: Final answer
    x = 27,217.77

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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.