Home / 20,969.13-28,937.39-11,537.49

Finding the Fourth Proportional to 20,969.13, 28,937.39 and 11,537.49

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Solution

The fourth proportional to 20,969.13, 28,937.39 and 11,537.49 is: 15,921.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.13 : 28,937.39 = 11,537.49 : x
  2. Step 2: Convert to fraction form
    20,969.13/28,937.39 = 11,537.49/x
  3. Step 3: Cross multiply
    20,969.13x = 28,937.39 × 11,537.49
  4. Step 4: Simplify right side
    20,969.13x = 333,864,847.75
  5. Step 5: Solve for x
    x = 333,864,847.75/20,969.13
  6. Step 6: Final answer
    x = 15,921.73

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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.