Home / 20,687.68-31,039.03-10,156.58

Finding the Fourth Proportional to 20,687.68, 31,039.03 and 10,156.58

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Solution

The fourth proportional to 20,687.68, 31,039.03 and 10,156.58 is: 15,238.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.68 : 31,039.03 = 10,156.58 : x
  2. Step 2: Convert to fraction form
    20,687.68/31,039.03 = 10,156.58/x
  3. Step 3: Cross multiply
    20,687.68x = 31,039.03 × 10,156.58
  4. Step 4: Simplify right side
    20,687.68x = 315,250,236.12
  5. Step 5: Solve for x
    x = 315,250,236.12/20,687.68
  6. Step 6: Final answer
    x = 15,238.55

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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.