Home / 13,781.80-20,610.40-10,618.85

Finding the Fourth Proportional to 13,781.80, 20,610.40 and 10,618.85

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Solution

The fourth proportional to 13,781.80, 20,610.40 and 10,618.85 is: 15,880.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.80 : 20,610.40 = 10,618.85 : x
  2. Step 2: Convert to fraction form
    13,781.80/20,610.40 = 10,618.85/x
  3. Step 3: Cross multiply
    13,781.80x = 20,610.40 × 10,618.85
  4. Step 4: Simplify right side
    13,781.80x = 218,858,675.00
  5. Step 5: Solve for x
    x = 218,858,675.00/13,781.80
  6. Step 6: Final answer
    x = 15,880.27

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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.