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Finding the Fourth Proportional to 25,879.77, 38,811.35 and 8,345.49

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Solution

The fourth proportional to 25,879.77, 38,811.35 and 8,345.49 is: 12,515.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,879.77 : 38,811.35 = 8,345.49 : x
  2. Step 2: Convert to fraction form
    25,879.77/38,811.35 = 8,345.49/x
  3. Step 3: Cross multiply
    25,879.77x = 38,811.35 × 8,345.49
  4. Step 4: Simplify right side
    25,879.77x = 323,899,691.58
  5. Step 5: Solve for x
    x = 323,899,691.58/25,879.77
  6. Step 6: Final answer
    x = 12,515.56

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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.