Home / 12,991.08-19,487.12-7,441.90

Finding the Fourth Proportional to 12,991.08, 19,487.12 and 7,441.90

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Solution

The fourth proportional to 12,991.08, 19,487.12 and 7,441.90 is: 11,163.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.08 : 19,487.12 = 7,441.90 : x
  2. Step 2: Convert to fraction form
    12,991.08/19,487.12 = 7,441.90/x
  3. Step 3: Cross multiply
    12,991.08x = 19,487.12 × 7,441.90
  4. Step 4: Simplify right side
    12,991.08x = 145,021,198.33
  5. Step 5: Solve for x
    x = 145,021,198.33/12,991.08
  6. Step 6: Final answer
    x = 11,163.14

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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.