Home / 20,540.19-30,791.56-7,389.55

Finding the Fourth Proportional to 20,540.19, 30,791.56 and 7,389.55

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Solution

The fourth proportional to 20,540.19, 30,791.56 and 7,389.55 is: 11,077.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.19 : 30,791.56 = 7,389.55 : x
  2. Step 2: Convert to fraction form
    20,540.19/30,791.56 = 7,389.55/x
  3. Step 3: Cross multiply
    20,540.19x = 30,791.56 × 7,389.55
  4. Step 4: Simplify right side
    20,540.19x = 227,535,772.20
  5. Step 5: Solve for x
    x = 227,535,772.20/20,540.19
  6. Step 6: Final answer
    x = 11,077.59

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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.