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Finding the Fourth Proportional to 21,601.52, 32,404.88 and 20,420.54

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Solution

The fourth proportional to 21,601.52, 32,404.88 and 20,420.54 is: 30,633.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,601.52 : 32,404.88 = 20,420.54 : x
  2. Step 2: Convert to fraction form
    21,601.52/32,404.88 = 20,420.54/x
  3. Step 3: Cross multiply
    21,601.52x = 32,404.88 × 20,420.54
  4. Step 4: Simplify right side
    21,601.52x = 661,725,226.19
  5. Step 5: Solve for x
    x = 661,725,226.19/21,601.52
  6. Step 6: Final answer
    x = 30,633.27

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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.