Home / 12,936.20-19,404.30-8,999.60

Finding the Fourth Proportional to 12,936.20, 19,404.30 and 8,999.60

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Solution

The fourth proportional to 12,936.20, 19,404.30 and 8,999.60 is: 13,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,936.20 : 19,404.30 = 8,999.60 : x
  2. Step 2: Convert to fraction form
    12,936.20/19,404.30 = 8,999.60/x
  3. Step 3: Cross multiply
    12,936.20x = 19,404.30 × 8,999.60
  4. Step 4: Simplify right side
    12,936.20x = 174,630,938.28
  5. Step 5: Solve for x
    x = 174,630,938.28/12,936.20
  6. Step 6: Final answer
    x = 13,499.40

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Similar ratio
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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.