Home / 20,839.05-28,750.77-11,880.09

Finding the Fourth Proportional to 20,839.05, 28,750.77 and 11,880.09

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Solution

The fourth proportional to 20,839.05, 28,750.77 and 11,880.09 is: 16,390.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.05 : 28,750.77 = 11,880.09 : x
  2. Step 2: Convert to fraction form
    20,839.05/28,750.77 = 11,880.09/x
  3. Step 3: Cross multiply
    20,839.05x = 28,750.77 × 11,880.09
  4. Step 4: Simplify right side
    20,839.05x = 341,561,735.17
  5. Step 5: Solve for x
    x = 341,561,735.17/20,839.05
  6. Step 6: Final answer
    x = 16,390.47

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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.