Home / 20,889.83-28,828.54-11,938.79

Finding the Fourth Proportional to 20,889.83, 28,828.54 and 11,938.79

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Solution

The fourth proportional to 20,889.83, 28,828.54 and 11,938.79 is: 16,475.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.83 : 28,828.54 = 11,938.79 : x
  2. Step 2: Convert to fraction form
    20,889.83/28,828.54 = 11,938.79/x
  3. Step 3: Cross multiply
    20,889.83x = 28,828.54 × 11,938.79
  4. Step 4: Simplify right side
    20,889.83x = 344,177,972.06
  5. Step 5: Solve for x
    x = 344,177,972.06/20,889.83
  6. Step 6: Final answer
    x = 16,475.86

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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.