Home / 13,190.80-19,781.40-6,614.80

Finding the Fourth Proportional to 13,190.80, 19,781.40 and 6,614.80

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Solution

The fourth proportional to 13,190.80, 19,781.40 and 6,614.80 is: 9,919.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,190.80 : 19,781.40 = 6,614.80 : x
  2. Step 2: Convert to fraction form
    13,190.80/19,781.40 = 6,614.80/x
  3. Step 3: Cross multiply
    13,190.80x = 19,781.40 × 6,614.80
  4. Step 4: Simplify right side
    13,190.80x = 130,850,004.72
  5. Step 5: Solve for x
    x = 130,850,004.72/13,190.80
  6. Step 6: Final answer
    x = 9,919.79

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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.