Home / 20,779.20-31,197.60-16,401.60

Finding the Fourth Proportional to 20,779.20, 31,197.60 and 16,401.60

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Solution

The fourth proportional to 20,779.20, 31,197.60 and 16,401.60 is: 24,625.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.20 : 31,197.60 = 16,401.60 : x
  2. Step 2: Convert to fraction form
    20,779.20/31,197.60 = 16,401.60/x
  3. Step 3: Cross multiply
    20,779.20x = 31,197.60 × 16,401.60
  4. Step 4: Simplify right side
    20,779.20x = 511,690,556.16
  5. Step 5: Solve for x
    x = 511,690,556.16/20,779.20
  6. Step 6: Final answer
    x = 24,625.13

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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.