Home / 25,390.86-38,078.38-8,520.58

Finding the Fourth Proportional to 25,390.86, 38,078.38 and 8,520.58

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Solution

The fourth proportional to 25,390.86, 38,078.38 and 8,520.58 is: 12,778.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,390.86 : 38,078.38 = 8,520.58 : x
  2. Step 2: Convert to fraction form
    25,390.86/38,078.38 = 8,520.58/x
  3. Step 3: Cross multiply
    25,390.86x = 38,078.38 × 8,520.58
  4. Step 4: Simplify right side
    25,390.86x = 324,449,883.06
  5. Step 5: Solve for x
    x = 324,449,883.06/25,390.86
  6. Step 6: Final answer
    x = 12,778.22

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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.