Home / 12,542.18-18,815.21-4,221.54

Finding the Fourth Proportional to 12,542.18, 18,815.21 and 4,221.54

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Solution

The fourth proportional to 12,542.18, 18,815.21 and 4,221.54 is: 6,332.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,542.18 : 18,815.21 = 4,221.54 : x
  2. Step 2: Convert to fraction form
    12,542.18/18,815.21 = 4,221.54/x
  3. Step 3: Cross multiply
    12,542.18x = 18,815.21 × 4,221.54
  4. Step 4: Simplify right side
    12,542.18x = 79,429,221.14
  5. Step 5: Solve for x
    x = 79,429,221.14/12,542.18
  6. Step 6: Final answer
    x = 6,332.97

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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.