Home / 20,481.76-30,721.56-10,090

Finding the Fourth Proportional to 20,481.76, 30,721.56 and 10,090

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Solution

The fourth proportional to 20,481.76, 30,721.56 and 10,090 is: 15,134.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.76 : 30,721.56 = 10,090 : x
  2. Step 2: Convert to fraction form
    20,481.76/30,721.56 = 10,090/x
  3. Step 3: Cross multiply
    20,481.76x = 30,721.56 × 10,090
  4. Step 4: Simplify right side
    20,481.76x = 309,980,540.40
  5. Step 5: Solve for x
    x = 309,980,540.40/20,481.76
  6. Step 6: Final answer
    x = 15,134.47

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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.