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Finding the Fourth Proportional to 7,211.70, 10,817.55 and 4,749.30

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Solution

The fourth proportional to 7,211.70, 10,817.55 and 4,749.30 is: 7,123.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,211.70 : 10,817.55 = 4,749.30 : x
  2. Step 2: Convert to fraction form
    7,211.70/10,817.55 = 4,749.30/x
  3. Step 3: Cross multiply
    7,211.70x = 10,817.55 × 4,749.30
  4. Step 4: Simplify right side
    7,211.70x = 51,375,790.22
  5. Step 5: Solve for x
    x = 51,375,790.22/7,211.70
  6. Step 6: Final answer
    x = 7,123.95

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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.