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Finding the Fourth Proportional to 8,720.70, 12,029.36 and 5,576.82

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Solution

The fourth proportional to 8,720.70, 12,029.36 and 5,576.82 is: 7,692.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.70 : 12,029.36 = 5,576.82 : x
  2. Step 2: Convert to fraction form
    8,720.70/12,029.36 = 5,576.82/x
  3. Step 3: Cross multiply
    8,720.70x = 12,029.36 × 5,576.82
  4. Step 4: Simplify right side
    8,720.70x = 67,085,575.44
  5. Step 5: Solve for x
    x = 67,085,575.44/8,720.70
  6. Step 6: Final answer
    x = 7,692.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.