Home / 13,905.15-20,857.54-3,375.25

Finding the Fourth Proportional to 13,905.15, 20,857.54 and 3,375.25

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Solution

The fourth proportional to 13,905.15, 20,857.54 and 3,375.25 is: 5,062.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,905.15 : 20,857.54 = 3,375.25 : x
  2. Step 2: Convert to fraction form
    13,905.15/20,857.54 = 3,375.25/x
  3. Step 3: Cross multiply
    13,905.15x = 20,857.54 × 3,375.25
  4. Step 4: Simplify right side
    13,905.15x = 70,399,411.89
  5. Step 5: Solve for x
    x = 70,399,411.89/13,905.15
  6. Step 6: Final answer
    x = 5,062.83

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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.