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Finding the Fourth Proportional to 21,651.68, 32,551.64 and 20,028.44

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Solution

The fourth proportional to 21,651.68, 32,551.64 and 20,028.44 is: 30,111.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651.68 : 32,551.64 = 20,028.44 : x
  2. Step 2: Convert to fraction form
    21,651.68/32,551.64 = 20,028.44/x
  3. Step 3: Cross multiply
    21,651.68x = 32,551.64 × 20,028.44
  4. Step 4: Simplify right side
    21,651.68x = 651,958,624.99
  5. Step 5: Solve for x
    x = 651,958,624.99/21,651.68
  6. Step 6: Final answer
    x = 30,111.22

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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.