Home / 20,290.85-28,000.83-11,338.43

Finding the Fourth Proportional to 20,290.85, 28,000.83 and 11,338.43

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Solution

The fourth proportional to 20,290.85, 28,000.83 and 11,338.43 is: 15,646.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,290.85 : 28,000.83 = 11,338.43 : x
  2. Step 2: Convert to fraction form
    20,290.85/28,000.83 = 11,338.43/x
  3. Step 3: Cross multiply
    20,290.85x = 28,000.83 × 11,338.43
  4. Step 4: Simplify right side
    20,290.85x = 317,485,381.07
  5. Step 5: Solve for x
    x = 317,485,381.07/20,290.85
  6. Step 6: Final answer
    x = 15,646.73

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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.