Home / 20,736.77-31,105.13-5,154.39

Finding the Fourth Proportional to 20,736.77, 31,105.13 and 5,154.39

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Solution

The fourth proportional to 20,736.77, 31,105.13 and 5,154.39 is: 7,731.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.77 : 31,105.13 = 5,154.39 : x
  2. Step 2: Convert to fraction form
    20,736.77/31,105.13 = 5,154.39/x
  3. Step 3: Cross multiply
    20,736.77x = 31,105.13 × 5,154.39
  4. Step 4: Simplify right side
    20,736.77x = 160,327,971.02
  5. Step 5: Solve for x
    x = 160,327,971.02/20,736.77
  6. Step 6: Final answer
    x = 7,731.58

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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.