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Finding the Fourth Proportional to 14,481.80, 19,984.60 and 8,108.40

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Solution

The fourth proportional to 14,481.80, 19,984.60 and 8,108.40 is: 11,189.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,481.80 : 19,984.60 = 8,108.40 : x
  2. Step 2: Convert to fraction form
    14,481.80/19,984.60 = 8,108.40/x
  3. Step 3: Cross multiply
    14,481.80x = 19,984.60 × 8,108.40
  4. Step 4: Simplify right side
    14,481.80x = 162,043,130.64
  5. Step 5: Solve for x
    x = 162,043,130.64/14,481.80
  6. Step 6: Final answer
    x = 11,189.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.