Home / 15,879.30-21,914.78-8,808

Finding the Fourth Proportional to 15,879.30, 21,914.78 and 8,808

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Solution

The fourth proportional to 15,879.30, 21,914.78 and 8,808 is: 12,155.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879.30 : 21,914.78 = 8,808 : x
  2. Step 2: Convert to fraction form
    15,879.30/21,914.78 = 8,808/x
  3. Step 3: Cross multiply
    15,879.30x = 21,914.78 × 8,808
  4. Step 4: Simplify right side
    15,879.30x = 193,025,338.20
  5. Step 5: Solve for x
    x = 193,025,338.20/15,879.30
  6. Step 6: Final answer
    x = 12,155.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.