Home / 20,889.89-28,828.09-11,937.37

Finding the Fourth Proportional to 20,889.89, 28,828.09 and 11,937.37

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Solution

The fourth proportional to 20,889.89, 28,828.09 and 11,937.37 is: 16,473.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.89 : 28,828.09 = 11,937.37 : x
  2. Step 2: Convert to fraction form
    20,889.89/28,828.09 = 11,937.37/x
  3. Step 3: Cross multiply
    20,889.89x = 28,828.09 × 11,937.37
  4. Step 4: Simplify right side
    20,889.89x = 344,131,474.81
  5. Step 5: Solve for x
    x = 344,131,474.81/20,889.89
  6. Step 6: Final answer
    x = 16,473.59

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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.