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Finding the Fourth Proportional to 9,001.80, 13,481.84 and 8,690.36

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Solution

The fourth proportional to 9,001.80, 13,481.84 and 8,690.36 is: 13,015.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,001.80 : 13,481.84 = 8,690.36 : x
  2. Step 2: Convert to fraction form
    9,001.80/13,481.84 = 8,690.36/x
  3. Step 3: Cross multiply
    9,001.80x = 13,481.84 × 8,690.36
  4. Step 4: Simplify right side
    9,001.80x = 117,161,997.38
  5. Step 5: Solve for x
    x = 117,161,997.38/9,001.80
  6. Step 6: Final answer
    x = 13,015.40

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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.