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Finding the Fourth Proportional to 5,645.58, 8,472.15 and 2,138.82

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Solution

The fourth proportional to 5,645.58, 8,472.15 and 2,138.82 is: 3,209.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,645.58 : 8,472.15 = 2,138.82 : x
  2. Step 2: Convert to fraction form
    5,645.58/8,472.15 = 2,138.82/x
  3. Step 3: Cross multiply
    5,645.58x = 8,472.15 × 2,138.82
  4. Step 4: Simplify right side
    5,645.58x = 18,120,403.86
  5. Step 5: Solve for x
    x = 18,120,403.86/5,645.58
  6. Step 6: Final answer
    x = 3,209.66

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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.