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Finding the Fourth Proportional to 18,824.44, 28,219.92 and 7,145.88

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Solution

The fourth proportional to 18,824.44, 28,219.92 and 7,145.88 is: 10,712.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,824.44 : 28,219.92 = 7,145.88 : x
  2. Step 2: Convert to fraction form
    18,824.44/28,219.92 = 7,145.88/x
  3. Step 3: Cross multiply
    18,824.44x = 28,219.92 × 7,145.88
  4. Step 4: Simplify right side
    18,824.44x = 201,656,161.93
  5. Step 5: Solve for x
    x = 201,656,161.93/18,824.44
  6. Step 6: Final answer
    x = 10,712.47

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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.