Home / 13,561.55-20,345.39-7,321.44

Finding the Fourth Proportional to 13,561.55, 20,345.39 and 7,321.44

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Solution

The fourth proportional to 13,561.55, 20,345.39 and 7,321.44 is: 10,983.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,561.55 : 20,345.39 = 7,321.44 : x
  2. Step 2: Convert to fraction form
    13,561.55/20,345.39 = 7,321.44/x
  3. Step 3: Cross multiply
    13,561.55x = 20,345.39 × 7,321.44
  4. Step 4: Simplify right side
    13,561.55x = 148,957,552.16
  5. Step 5: Solve for x
    x = 148,957,552.16/13,561.55
  6. Step 6: Final answer
    x = 10,983.81

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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.