Home / 3,115.20-4,675.11-1,946.91

Finding the Fourth Proportional to 3,115.20, 4,675.11 and 1,946.91

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Solution

The fourth proportional to 3,115.20, 4,675.11 and 1,946.91 is: 2,921.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.20 : 4,675.11 = 1,946.91 : x
  2. Step 2: Convert to fraction form
    3,115.20/4,675.11 = 1,946.91/x
  3. Step 3: Cross multiply
    3,115.20x = 4,675.11 × 1,946.91
  4. Step 4: Simplify right side
    3,115.20x = 9,102,018.41
  5. Step 5: Solve for x
    x = 9,102,018.41/3,115.20
  6. Step 6: Final answer
    x = 2,921.81

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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.