Home / 13,777.20-19,012.56-7,489.60

Finding the Fourth Proportional to 13,777.20, 19,012.56 and 7,489.60

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Solution

The fourth proportional to 13,777.20, 19,012.56 and 7,489.60 is: 10,335.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,777.20 : 19,012.56 = 7,489.60 : x
  2. Step 2: Convert to fraction form
    13,777.20/19,012.56 = 7,489.60/x
  3. Step 3: Cross multiply
    13,777.20x = 19,012.56 × 7,489.60
  4. Step 4: Simplify right side
    13,777.20x = 142,396,469.38
  5. Step 5: Solve for x
    x = 142,396,469.38/13,777.20
  6. Step 6: Final answer
    x = 10,335.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.