Home / 20,727.87-31,091.80-5,145.49

Finding the Fourth Proportional to 20,727.87, 31,091.80 and 5,145.49

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Solution

The fourth proportional to 20,727.87, 31,091.80 and 5,145.49 is: 7,718.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,727.87 : 31,091.80 = 5,145.49 : x
  2. Step 2: Convert to fraction form
    20,727.87/31,091.80 = 5,145.49/x
  3. Step 3: Cross multiply
    20,727.87x = 31,091.80 × 5,145.49
  4. Step 4: Simplify right side
    20,727.87x = 159,982,581.63
  5. Step 5: Solve for x
    x = 159,982,581.63/20,727.87
  6. Step 6: Final answer
    x = 7,718.24

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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.