Home / 12,021.60-18,029.16-8,149.80

Finding the Fourth Proportional to 12,021.60, 18,029.16 and 8,149.80

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Solution

The fourth proportional to 12,021.60, 18,029.16 and 8,149.80 is: 12,222.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,021.60 : 18,029.16 = 8,149.80 : x
  2. Step 2: Convert to fraction form
    12,021.60/18,029.16 = 8,149.80/x
  3. Step 3: Cross multiply
    12,021.60x = 18,029.16 × 8,149.80
  4. Step 4: Simplify right side
    12,021.60x = 146,934,048.17
  5. Step 5: Solve for x
    x = 146,934,048.17/12,021.60
  6. Step 6: Final answer
    x = 12,222.50

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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.