Home / 20,788.20-31,211.10-16,410.60

Finding the Fourth Proportional to 20,788.20, 31,211.10 and 16,410.60

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Solution

The fourth proportional to 20,788.20, 31,211.10 and 16,410.60 is: 24,638.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.20 : 31,211.10 = 16,410.60 : x
  2. Step 2: Convert to fraction form
    20,788.20/31,211.10 = 16,410.60/x
  3. Step 3: Cross multiply
    20,788.20x = 31,211.10 × 16,410.60
  4. Step 4: Simplify right side
    20,788.20x = 512,192,877.66
  5. Step 5: Solve for x
    x = 512,192,877.66/20,788.20
  6. Step 6: Final answer
    x = 24,638.64

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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.