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Finding the Fourth Proportional to 21,324.60, 32,025.30 and 20,633.40

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Solution

The fourth proportional to 21,324.60, 32,025.30 and 20,633.40 is: 30,987.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324.60 : 32,025.30 = 20,633.40 : x
  2. Step 2: Convert to fraction form
    21,324.60/32,025.30 = 20,633.40/x
  3. Step 3: Cross multiply
    21,324.60x = 32,025.30 × 20,633.40
  4. Step 4: Simplify right side
    21,324.60x = 660,790,825.02
  5. Step 5: Solve for x
    x = 660,790,825.02/21,324.60
  6. Step 6: Final answer
    x = 30,987.26

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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.