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Finding the Fourth Proportional to 7,672.70, 11,521.20 and 5,218.40

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Solution

The fourth proportional to 7,672.70, 11,521.20 and 5,218.40 is: 7,835.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,672.70 : 11,521.20 = 5,218.40 : x
  2. Step 2: Convert to fraction form
    7,672.70/11,521.20 = 5,218.40/x
  3. Step 3: Cross multiply
    7,672.70x = 11,521.20 × 5,218.40
  4. Step 4: Simplify right side
    7,672.70x = 60,122,230.08
  5. Step 5: Solve for x
    x = 60,122,230.08/7,672.70
  6. Step 6: Final answer
    x = 7,835.86

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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.