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Finding the Fourth Proportional to 12,542.22, 18,810.90 and 11,917.80

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Solution

The fourth proportional to 12,542.22, 18,810.90 and 11,917.80 is: 17,874.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,542.22 : 18,810.90 = 11,917.80 : x
  2. Step 2: Convert to fraction form
    12,542.22/18,810.90 = 11,917.80/x
  3. Step 3: Cross multiply
    12,542.22x = 18,810.90 × 11,917.80
  4. Step 4: Simplify right side
    12,542.22x = 224,184,544.02
  5. Step 5: Solve for x
    x = 224,184,544.02/12,542.22
  6. Step 6: Final answer
    x = 17,874.39

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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.