Home / 18,758.40-28,137.68-7,665.12

Finding the Fourth Proportional to 18,758.40, 28,137.68 and 7,665.12

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Solution

The fourth proportional to 18,758.40, 28,137.68 and 7,665.12 is: 11,497.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.40 : 28,137.68 = 7,665.12 : x
  2. Step 2: Convert to fraction form
    18,758.40/28,137.68 = 7,665.12/x
  3. Step 3: Cross multiply
    18,758.40x = 28,137.68 × 7,665.12
  4. Step 4: Simplify right side
    18,758.40x = 215,678,655.40
  5. Step 5: Solve for x
    x = 215,678,655.40/18,758.40
  6. Step 6: Final answer
    x = 11,497.71

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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.