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Finding the Fourth Proportional to 21,704.10, 32,556.15 and 20,829.30

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Solution

The fourth proportional to 21,704.10, 32,556.15 and 20,829.30 is: 31,243.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,704.10 : 32,556.15 = 20,829.30 : x
  2. Step 2: Convert to fraction form
    21,704.10/32,556.15 = 20,829.30/x
  3. Step 3: Cross multiply
    21,704.10x = 32,556.15 × 20,829.30
  4. Step 4: Simplify right side
    21,704.10x = 678,121,815.20
  5. Step 5: Solve for x
    x = 678,121,815.20/21,704.10
  6. Step 6: Final answer
    x = 31,243.95

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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.