Home / 20,738.96-28,620.36-11,307.68

Finding the Fourth Proportional to 20,738.96, 28,620.36 and 11,307.68

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Solution

The fourth proportional to 20,738.96, 28,620.36 and 11,307.68 is: 15,604.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.96 : 28,620.36 = 11,307.68 : x
  2. Step 2: Convert to fraction form
    20,738.96/28,620.36 = 11,307.68/x
  3. Step 3: Cross multiply
    20,738.96x = 28,620.36 × 11,307.68
  4. Step 4: Simplify right side
    20,738.96x = 323,629,872.36
  5. Step 5: Solve for x
    x = 323,629,872.36/20,738.96
  6. Step 6: Final answer
    x = 15,604.92

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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.