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Finding the Fourth Proportional to 11,998.84, 18,000.39 and 5,770.15

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Solution

The fourth proportional to 11,998.84, 18,000.39 and 5,770.15 is: 8,656.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,998.84 : 18,000.39 = 5,770.15 : x
  2. Step 2: Convert to fraction form
    11,998.84/18,000.39 = 5,770.15/x
  3. Step 3: Cross multiply
    11,998.84x = 18,000.39 × 5,770.15
  4. Step 4: Simplify right side
    11,998.84x = 103,864,950.36
  5. Step 5: Solve for x
    x = 103,864,950.36/11,998.84
  6. Step 6: Final answer
    x = 8,656.25

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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.