Home / 20,900.06-28,842.08-11,947.75

Finding the Fourth Proportional to 20,900.06, 28,842.08 and 11,947.75

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Solution

The fourth proportional to 20,900.06, 28,842.08 and 11,947.75 is: 16,487.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.06 : 28,842.08 = 11,947.75 : x
  2. Step 2: Convert to fraction form
    20,900.06/28,842.08 = 11,947.75/x
  3. Step 3: Cross multiply
    20,900.06x = 28,842.08 × 11,947.75
  4. Step 4: Simplify right side
    20,900.06x = 344,597,961.32
  5. Step 5: Solve for x
    x = 344,597,961.32/20,900.06
  6. Step 6: Final answer
    x = 16,487.89

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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.