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Finding the Fourth Proportional to 21,640.99, 32,441.89 and 8,489.83

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Solution

The fourth proportional to 21,640.99, 32,441.89 and 8,489.83 is: 12,727.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,640.99 : 32,441.89 = 8,489.83 : x
  2. Step 2: Convert to fraction form
    21,640.99/32,441.89 = 8,489.83/x
  3. Step 3: Cross multiply
    21,640.99x = 32,441.89 × 8,489.83
  4. Step 4: Simplify right side
    21,640.99x = 275,426,130.98
  5. Step 5: Solve for x
    x = 275,426,130.98/21,640.99
  6. Step 6: Final answer
    x = 12,727.06

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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.