Home / 3,945.15-5,427.54-3,835.80

Finding the Fourth Proportional to 3,945.15, 5,427.54 and 3,835.80

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Solution

The fourth proportional to 3,945.15, 5,427.54 and 3,835.80 is: 5,277.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.15 : 5,427.54 = 3,835.80 : x
  2. Step 2: Convert to fraction form
    3,945.15/5,427.54 = 3,835.80/x
  3. Step 3: Cross multiply
    3,945.15x = 5,427.54 × 3,835.80
  4. Step 4: Simplify right side
    3,945.15x = 20,818,957.93
  5. Step 5: Solve for x
    x = 20,818,957.93/3,945.15
  6. Step 6: Final answer
    x = 5,277.10

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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.