Home / 10,218.38-15,319.22-5,289.44

Finding the Fourth Proportional to 10,218.38, 15,319.22 and 5,289.44

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Solution

The fourth proportional to 10,218.38, 15,319.22 and 5,289.44 is: 7,929.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,218.38 : 15,319.22 = 5,289.44 : x
  2. Step 2: Convert to fraction form
    10,218.38/15,319.22 = 5,289.44/x
  3. Step 3: Cross multiply
    10,218.38x = 15,319.22 × 5,289.44
  4. Step 4: Simplify right side
    10,218.38x = 81,029,991.99
  5. Step 5: Solve for x
    x = 81,029,991.99/10,218.38
  6. Step 6: Final answer
    x = 7,929.83

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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.