Home / 13,178.20-19,781.70-7,331.80

Finding the Fourth Proportional to 13,178.20, 19,781.70 and 7,331.80

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Solution

The fourth proportional to 13,178.20, 19,781.70 and 7,331.80 is: 11,005.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.20 : 19,781.70 = 7,331.80 : x
  2. Step 2: Convert to fraction form
    13,178.20/19,781.70 = 7,331.80/x
  3. Step 3: Cross multiply
    13,178.20x = 19,781.70 × 7,331.80
  4. Step 4: Simplify right side
    13,178.20x = 145,035,468.06
  5. Step 5: Solve for x
    x = 145,035,468.06/13,178.20
  6. Step 6: Final answer
    x = 11,005.71

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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.