Home / 20,481.11-30,720.23-11,688.47

Finding the Fourth Proportional to 20,481.11, 30,720.23 and 11,688.47

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Solution

The fourth proportional to 20,481.11, 30,720.23 and 11,688.47 is: 17,531.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.11 : 30,720.23 = 11,688.47 : x
  2. Step 2: Convert to fraction form
    20,481.11/30,720.23 = 11,688.47/x
  3. Step 3: Cross multiply
    20,481.11x = 30,720.23 × 11,688.47
  4. Step 4: Simplify right side
    20,481.11x = 359,072,428.31
  5. Step 5: Solve for x
    x = 359,072,428.31/20,481.11
  6. Step 6: Final answer
    x = 17,531.88

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1.5x scale

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.