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Finding the Fourth Proportional to 8,205.72, 12,307.10 and 2,658.30

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Solution

The fourth proportional to 8,205.72, 12,307.10 and 2,658.30 is: 3,986.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,205.72 : 12,307.10 = 2,658.30 : x
  2. Step 2: Convert to fraction form
    8,205.72/12,307.10 = 2,658.30/x
  3. Step 3: Cross multiply
    8,205.72x = 12,307.10 × 2,658.30
  4. Step 4: Simplify right side
    8,205.72x = 32,715,950.64
  5. Step 5: Solve for x
    x = 32,715,950.64/8,205.72
  6. Step 6: Final answer
    x = 3,986.97

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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.