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Finding the Fourth Proportional to 18,847.89, 28,272.78 and 7,162.02

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Solution

The fourth proportional to 18,847.89, 28,272.78 and 7,162.02 is: 10,743.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,847.89 : 28,272.78 = 7,162.02 : x
  2. Step 2: Convert to fraction form
    18,847.89/28,272.78 = 7,162.02/x
  3. Step 3: Cross multiply
    18,847.89x = 28,272.78 × 7,162.02
  4. Step 4: Simplify right side
    18,847.89x = 202,490,215.82
  5. Step 5: Solve for x
    x = 202,490,215.82/18,847.89
  6. Step 6: Final answer
    x = 10,743.39

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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.