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Finding the Fourth Proportional to 7,671.70, 11,519.70 and 5,217.40

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Solution

The fourth proportional to 7,671.70, 11,519.70 and 5,217.40 is: 7,834.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,671.70 : 11,519.70 = 5,217.40 : x
  2. Step 2: Convert to fraction form
    7,671.70/11,519.70 = 5,217.40/x
  3. Step 3: Cross multiply
    7,671.70x = 11,519.70 × 5,217.40
  4. Step 4: Simplify right side
    7,671.70x = 60,102,882.78
  5. Step 5: Solve for x
    x = 60,102,882.78/7,671.70
  6. Step 6: Final answer
    x = 7,834.36

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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.