Home / 20,705.09-28,573.16-11,273.75

Finding the Fourth Proportional to 20,705.09, 28,573.16 and 11,273.75

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Solution

The fourth proportional to 20,705.09, 28,573.16 and 11,273.75 is: 15,557.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.09 : 28,573.16 = 11,273.75 : x
  2. Step 2: Convert to fraction form
    20,705.09/28,573.16 = 11,273.75/x
  3. Step 3: Cross multiply
    20,705.09x = 28,573.16 × 11,273.75
  4. Step 4: Simplify right side
    20,705.09x = 322,126,662.55
  5. Step 5: Solve for x
    x = 322,126,662.55/20,705.09
  6. Step 6: Final answer
    x = 15,557.85

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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.