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Finding the Fourth Proportional to 11,998.35, 17,991.47 and 7,002.43

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Solution

The fourth proportional to 11,998.35, 17,991.47 and 7,002.43 is: 10,500.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,998.35 : 17,991.47 = 7,002.43 : x
  2. Step 2: Convert to fraction form
    11,998.35/17,991.47 = 7,002.43/x
  3. Step 3: Cross multiply
    11,998.35x = 17,991.47 × 7,002.43
  4. Step 4: Simplify right side
    11,998.35x = 125,983,981.80
  5. Step 5: Solve for x
    x = 125,983,981.80/11,998.35
  6. Step 6: Final answer
    x = 10,500.11

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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.