Home / 20,739.08-28,620.06-11,307.80

Finding the Fourth Proportional to 20,739.08, 28,620.06 and 11,307.80

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Solution

The fourth proportional to 20,739.08, 28,620.06 and 11,307.80 is: 15,604.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.08 : 28,620.06 = 11,307.80 : x
  2. Step 2: Convert to fraction form
    20,739.08/28,620.06 = 11,307.80/x
  3. Step 3: Cross multiply
    20,739.08x = 28,620.06 × 11,307.80
  4. Step 4: Simplify right side
    20,739.08x = 323,629,914.47
  5. Step 5: Solve for x
    x = 323,629,914.47/20,739.08
  6. Step 6: Final answer
    x = 15,604.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.