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Finding the Fourth Proportional to 18,939.62, 28,400.22 and 7,095.20

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Solution

The fourth proportional to 18,939.62, 28,400.22 and 7,095.20 is: 10,639.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.62 : 28,400.22 = 7,095.20 : x
  2. Step 2: Convert to fraction form
    18,939.62/28,400.22 = 7,095.20/x
  3. Step 3: Cross multiply
    18,939.62x = 28,400.22 × 7,095.20
  4. Step 4: Simplify right side
    18,939.62x = 201,505,098.94
  5. Step 5: Solve for x
    x = 201,505,098.94/18,939.62
  6. Step 6: Final answer
    x = 10,639.34

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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.