Home / 20,499.93-30,720.20-11,132.01

Finding the Fourth Proportional to 20,499.93, 30,720.20 and 11,132.01

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Solution

The fourth proportional to 20,499.93, 30,720.20 and 11,132.01 is: 16,681.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.93 : 30,720.20 = 11,132.01 : x
  2. Step 2: Convert to fraction form
    20,499.93/30,720.20 = 11,132.01/x
  3. Step 3: Cross multiply
    20,499.93x = 30,720.20 × 11,132.01
  4. Step 4: Simplify right side
    20,499.93x = 341,977,517.94
  5. Step 5: Solve for x
    x = 341,977,517.94/20,499.93
  6. Step 6: Final answer
    x = 16,681.89

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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.