Home / 3,215.50-4,820.90-2,172.91

Finding the Fourth Proportional to 3,215.50, 4,820.90 and 2,172.91

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Solution

The fourth proportional to 3,215.50, 4,820.90 and 2,172.91 is: 3,257.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.50 : 4,820.90 = 2,172.91 : x
  2. Step 2: Convert to fraction form
    3,215.50/4,820.90 = 2,172.91/x
  3. Step 3: Cross multiply
    3,215.50x = 4,820.90 × 2,172.91
  4. Step 4: Simplify right side
    3,215.50x = 10,475,381.82
  5. Step 5: Solve for x
    x = 10,475,381.82/3,215.50
  6. Step 6: Final answer
    x = 3,257.78

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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.