Home / 18,738-28,142.75-10,856.34

Finding the Fourth Proportional to 18,738, 28,142.75 and 10,856.34

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Solution

The fourth proportional to 18,738, 28,142.75 and 10,856.34 is: 16,305.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,738 : 28,142.75 = 10,856.34 : x
  2. Step 2: Convert to fraction form
    18,738/28,142.75 = 10,856.34/x
  3. Step 3: Cross multiply
    18,738x = 28,142.75 × 10,856.34
  4. Step 4: Simplify right side
    18,738x = 305,527,289.68
  5. Step 5: Solve for x
    x = 305,527,289.68/18,738
  6. Step 6: Final answer
    x = 16,305.22

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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.