Home / 20,905.83-28,852.65-11,952.09

Finding the Fourth Proportional to 20,905.83, 28,852.65 and 11,952.09

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Solution

The fourth proportional to 20,905.83, 28,852.65 and 11,952.09 is: 16,495.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.83 : 28,852.65 = 11,952.09 : x
  2. Step 2: Convert to fraction form
    20,905.83/28,852.65 = 11,952.09/x
  3. Step 3: Cross multiply
    20,905.83x = 28,852.65 × 11,952.09
  4. Step 4: Simplify right side
    20,905.83x = 344,849,469.54
  5. Step 5: Solve for x
    x = 344,849,469.54/20,905.83
  6. Step 6: Final answer
    x = 16,495.37

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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.