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Finding the Fourth Proportional to 9,679.80, 14,521.68 and 5,521.80

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Solution

The fourth proportional to 9,679.80, 14,521.68 and 5,521.80 is: 8,283.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,679.80 : 14,521.68 = 5,521.80 : x
  2. Step 2: Convert to fraction form
    9,679.80/14,521.68 = 5,521.80/x
  3. Step 3: Cross multiply
    9,679.80x = 14,521.68 × 5,521.80
  4. Step 4: Simplify right side
    9,679.80x = 80,185,812.62
  5. Step 5: Solve for x
    x = 80,185,812.62/9,679.80
  6. Step 6: Final answer
    x = 8,283.83

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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.