Home / 20,850.24-28,775.40-11,899.09

Finding the Fourth Proportional to 20,850.24, 28,775.40 and 11,899.09

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Solution

The fourth proportional to 20,850.24, 28,775.40 and 11,899.09 is: 16,421.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.24 : 28,775.40 = 11,899.09 : x
  2. Step 2: Convert to fraction form
    20,850.24/28,775.40 = 11,899.09/x
  3. Step 3: Cross multiply
    20,850.24x = 28,775.40 × 11,899.09
  4. Step 4: Simplify right side
    20,850.24x = 342,401,050.86
  5. Step 5: Solve for x
    x = 342,401,050.86/20,850.24
  6. Step 6: Final answer
    x = 16,421.92

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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.