Home / 20,687.15-31,019.00-18,923.87

Finding the Fourth Proportional to 20,687.15, 31,019.00 and 18,923.87

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Solution

The fourth proportional to 20,687.15, 31,019.00 and 18,923.87 is: 28,375.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.15 : 31,019.00 = 18,923.87 : x
  2. Step 2: Convert to fraction form
    20,687.15/31,019.00 = 18,923.87/x
  3. Step 3: Cross multiply
    20,687.15x = 31,019.00 × 18,923.87
  4. Step 4: Simplify right side
    20,687.15x = 586,999,273.82
  5. Step 5: Solve for x
    x = 586,999,273.82/20,687.15
  6. Step 6: Final answer
    x = 28,375.07

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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.