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Finding the Fourth Proportional to 20,400.56, 30,591.61 and 7,253.28

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Solution

The fourth proportional to 20,400.56, 30,591.61 and 7,253.28 is: 10,876.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.56 : 30,591.61 = 7,253.28 : x
  2. Step 2: Convert to fraction form
    20,400.56/30,591.61 = 7,253.28/x
  3. Step 3: Cross multiply
    20,400.56x = 30,591.61 × 7,253.28
  4. Step 4: Simplify right side
    20,400.56x = 221,889,494.85
  5. Step 5: Solve for x
    x = 221,889,494.85/20,400.56
  6. Step 6: Final answer
    x = 10,876.64

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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.