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Finding the Fourth Proportional to 21,697.92, 32,512.80 and 16,779.60

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Solution

The fourth proportional to 21,697.92, 32,512.80 and 16,779.60 is: 25,143.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,697.92 : 32,512.80 = 16,779.60 : x
  2. Step 2: Convert to fraction form
    21,697.92/32,512.80 = 16,779.60/x
  3. Step 3: Cross multiply
    21,697.92x = 32,512.80 × 16,779.60
  4. Step 4: Simplify right side
    21,697.92x = 545,551,778.88
  5. Step 5: Solve for x
    x = 545,551,778.88/21,697.92
  6. Step 6: Final answer
    x = 25,143.04

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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.