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Finding the Fourth Proportional to 21,764.88, 32,691.08 and 19,020.20

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Solution

The fourth proportional to 21,764.88, 32,691.08 and 19,020.20 is: 28,568.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,764.88 : 32,691.08 = 19,020.20 : x
  2. Step 2: Convert to fraction form
    21,764.88/32,691.08 = 19,020.20/x
  3. Step 3: Cross multiply
    21,764.88x = 32,691.08 × 19,020.20
  4. Step 4: Simplify right side
    21,764.88x = 621,790,621.26
  5. Step 5: Solve for x
    x = 621,790,621.26/21,764.88
  6. Step 6: Final answer
    x = 28,568.53

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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.