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Finding the Fourth Proportional to 13,775.22, 20,659.73 and 3,914.28

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Solution

The fourth proportional to 13,775.22, 20,659.73 and 3,914.28 is: 5,870.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,775.22 : 20,659.73 = 3,914.28 : x
  2. Step 2: Convert to fraction form
    13,775.22/20,659.73 = 3,914.28/x
  3. Step 3: Cross multiply
    13,775.22x = 20,659.73 × 3,914.28
  4. Step 4: Simplify right side
    13,775.22x = 80,867,948.37
  5. Step 5: Solve for x
    x = 80,867,948.37/13,775.22
  6. Step 6: Final answer
    x = 5,870.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.