Home / 18,868.36-28,300.90-6,388.11

Finding the Fourth Proportional to 18,868.36, 28,300.90 and 6,388.11

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Solution

The fourth proportional to 18,868.36, 28,300.90 and 6,388.11 is: 9,581.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.36 : 28,300.90 = 6,388.11 : x
  2. Step 2: Convert to fraction form
    18,868.36/28,300.90 = 6,388.11/x
  3. Step 3: Cross multiply
    18,868.36x = 28,300.90 × 6,388.11
  4. Step 4: Simplify right side
    18,868.36x = 180,789,262.30
  5. Step 5: Solve for x
    x = 180,789,262.30/18,868.36
  6. Step 6: Final answer
    x = 9,581.61

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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.