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Finding the Fourth Proportional to 18,857.59, 28,290.02 and 7,169.90

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Solution

The fourth proportional to 18,857.59, 28,290.02 and 7,169.90 is: 10,756.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,857.59 : 28,290.02 = 7,169.90 : x
  2. Step 2: Convert to fraction form
    18,857.59/28,290.02 = 7,169.90/x
  3. Step 3: Cross multiply
    18,857.59x = 28,290.02 × 7,169.90
  4. Step 4: Simplify right side
    18,857.59x = 202,836,490.87
  5. Step 5: Solve for x
    x = 202,836,490.87/18,857.59
  6. Step 6: Final answer
    x = 10,756.23

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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.