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Finding the Fourth Proportional to 7,686.80, 11,522.10 and 4,392.80

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Solution

The fourth proportional to 7,686.80, 11,522.10 and 4,392.80 is: 6,584.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,686.80 : 11,522.10 = 4,392.80 : x
  2. Step 2: Convert to fraction form
    7,686.80/11,522.10 = 4,392.80/x
  3. Step 3: Cross multiply
    7,686.80x = 11,522.10 × 4,392.80
  4. Step 4: Simplify right side
    7,686.80x = 50,614,280.88
  5. Step 5: Solve for x
    x = 50,614,280.88/7,686.80
  6. Step 6: Final answer
    x = 6,584.57

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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.