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Finding the Fourth Proportional to 8,462.80, 11,679.42 and 4,686.85

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Solution

The fourth proportional to 8,462.80, 11,679.42 and 4,686.85 is: 6,468.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,462.80 : 11,679.42 = 4,686.85 : x
  2. Step 2: Convert to fraction form
    8,462.80/11,679.42 = 4,686.85/x
  3. Step 3: Cross multiply
    8,462.80x = 11,679.42 × 4,686.85
  4. Step 4: Simplify right side
    8,462.80x = 54,739,689.63
  5. Step 5: Solve for x
    x = 54,739,689.63/8,462.80
  6. Step 6: Final answer
    x = 6,468.27

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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.