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Finding the Fourth Proportional to 15,879.78, 23,799.96 and 5,479.38

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Solution

The fourth proportional to 15,879.78, 23,799.96 and 5,479.38 is: 8,212.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879.78 : 23,799.96 = 5,479.38 : x
  2. Step 2: Convert to fraction form
    15,879.78/23,799.96 = 5,479.38/x
  3. Step 3: Cross multiply
    15,879.78x = 23,799.96 × 5,479.38
  4. Step 4: Simplify right side
    15,879.78x = 130,409,024.82
  5. Step 5: Solve for x
    x = 130,409,024.82/15,879.78
  6. Step 6: Final answer
    x = 8,212.27

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1.5x scale

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.