Home / 5,211.45-7,817.18-1,315.85

Finding the Fourth Proportional to 5,211.45, 7,817.18 and 1,315.85

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Solution

The fourth proportional to 5,211.45, 7,817.18 and 1,315.85 is: 1,973.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.45 : 7,817.18 = 1,315.85 : x
  2. Step 2: Convert to fraction form
    5,211.45/7,817.18 = 1,315.85/x
  3. Step 3: Cross multiply
    5,211.45x = 7,817.18 × 1,315.85
  4. Step 4: Simplify right side
    5,211.45x = 10,286,236.30
  5. Step 5: Solve for x
    x = 10,286,236.30/5,211.45
  6. Step 6: Final answer
    x = 1,973.78

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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.