Home / 13,331.20-19,996.80-7,790.80

Finding the Fourth Proportional to 13,331.20, 19,996.80 and 7,790.80

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Solution

The fourth proportional to 13,331.20, 19,996.80 and 7,790.80 is: 11,686.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,331.20 : 19,996.80 = 7,790.80 : x
  2. Step 2: Convert to fraction form
    13,331.20/19,996.80 = 7,790.80/x
  3. Step 3: Cross multiply
    13,331.20x = 19,996.80 × 7,790.80
  4. Step 4: Simplify right side
    13,331.20x = 155,791,069.44
  5. Step 5: Solve for x
    x = 155,791,069.44/13,331.20
  6. Step 6: Final answer
    x = 11,686.20

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Similar ratio
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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.