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Finding the Fourth Proportional to 21,953.56, 32,922.10 and 7,909.80

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Solution

The fourth proportional to 21,953.56, 32,922.10 and 7,909.80 is: 11,861.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,953.56 : 32,922.10 = 7,909.80 : x
  2. Step 2: Convert to fraction form
    21,953.56/32,922.10 = 7,909.80/x
  3. Step 3: Cross multiply
    21,953.56x = 32,922.10 × 7,909.80
  4. Step 4: Simplify right side
    21,953.56x = 260,407,226.58
  5. Step 5: Solve for x
    x = 260,407,226.58/21,953.56
  6. Step 6: Final answer
    x = 11,861.73

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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.