Home / 3,500.86-5,251.56-2,115.76

Finding the Fourth Proportional to 3,500.86, 5,251.56 and 2,115.76

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Solution

The fourth proportional to 3,500.86, 5,251.56 and 2,115.76 is: 3,173.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,500.86 : 5,251.56 = 2,115.76 : x
  2. Step 2: Convert to fraction form
    3,500.86/5,251.56 = 2,115.76/x
  3. Step 3: Cross multiply
    3,500.86x = 5,251.56 × 2,115.76
  4. Step 4: Simplify right side
    3,500.86x = 11,111,040.59
  5. Step 5: Solve for x
    x = 11,111,040.59/3,500.86
  6. Step 6: Final answer
    x = 3,173.80

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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.