Home / 12,542.30-18,815.97-4,221.98

Finding the Fourth Proportional to 12,542.30, 18,815.97 and 4,221.98

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Solution

The fourth proportional to 12,542.30, 18,815.97 and 4,221.98 is: 6,333.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,542.30 : 18,815.97 = 4,221.98 : x
  2. Step 2: Convert to fraction form
    12,542.30/18,815.97 = 4,221.98/x
  3. Step 3: Cross multiply
    12,542.30x = 18,815.97 × 4,221.98
  4. Step 4: Simplify right side
    12,542.30x = 79,440,649.02
  5. Step 5: Solve for x
    x = 79,440,649.02/12,542.30
  6. Step 6: Final answer
    x = 6,333.82

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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.