Home / 18,758.90-28,142.32-7,072.22

Finding the Fourth Proportional to 18,758.90, 28,142.32 and 7,072.22

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Solution

The fourth proportional to 18,758.90, 28,142.32 and 7,072.22 is: 10,609.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.90 : 28,142.32 = 7,072.22 : x
  2. Step 2: Convert to fraction form
    18,758.90/28,142.32 = 7,072.22/x
  3. Step 3: Cross multiply
    18,758.90x = 28,142.32 × 7,072.22
  4. Step 4: Simplify right side
    18,758.90x = 199,028,678.35
  5. Step 5: Solve for x
    x = 199,028,678.35/18,758.90
  6. Step 6: Final answer
    x = 10,609.83

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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.