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Finding the Fourth Proportional to 25,879.72, 38,819.60 and 11,079.06

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Solution

The fourth proportional to 25,879.72, 38,819.60 and 11,079.06 is: 16,618.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,879.72 : 38,819.60 = 11,079.06 : x
  2. Step 2: Convert to fraction form
    25,879.72/38,819.60 = 11,079.06/x
  3. Step 3: Cross multiply
    25,879.72x = 38,819.60 × 11,079.06
  4. Step 4: Simplify right side
    25,879.72x = 430,084,677.58
  5. Step 5: Solve for x
    x = 430,084,677.58/25,879.72
  6. Step 6: Final answer
    x = 16,618.60

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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.