Home / 20,906.78-28,852.45-11,956.07

Finding the Fourth Proportional to 20,906.78, 28,852.45 and 11,956.07

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Solution

The fourth proportional to 20,906.78, 28,852.45 and 11,956.07 is: 16,500.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.78 : 28,852.45 = 11,956.07 : x
  2. Step 2: Convert to fraction form
    20,906.78/28,852.45 = 11,956.07/x
  3. Step 3: Cross multiply
    20,906.78x = 28,852.45 × 11,956.07
  4. Step 4: Simplify right side
    20,906.78x = 344,962,021.37
  5. Step 5: Solve for x
    x = 344,962,021.37/20,906.78
  6. Step 6: Final answer
    x = 16,500.01

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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.