Home / 20,756.36-28,644.09-11,324.91

Finding the Fourth Proportional to 20,756.36, 28,644.09 and 11,324.91

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Solution

The fourth proportional to 20,756.36, 28,644.09 and 11,324.91 is: 15,628.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.36 : 28,644.09 = 11,324.91 : x
  2. Step 2: Convert to fraction form
    20,756.36/28,644.09 = 11,324.91/x
  3. Step 3: Cross multiply
    20,756.36x = 28,644.09 × 11,324.91
  4. Step 4: Simplify right side
    20,756.36x = 324,391,741.28
  5. Step 5: Solve for x
    x = 324,391,741.28/20,756.36
  6. Step 6: Final answer
    x = 15,628.55

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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.