Home / 3,953.12-5,415.70-3,805.40

Finding the Fourth Proportional to 3,953.12, 5,415.70 and 3,805.40

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Solution

The fourth proportional to 3,953.12, 5,415.70 and 3,805.40 is: 5,213.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,953.12 : 5,415.70 = 3,805.40 : x
  2. Step 2: Convert to fraction form
    3,953.12/5,415.70 = 3,805.40/x
  3. Step 3: Cross multiply
    3,953.12x = 5,415.70 × 3,805.40
  4. Step 4: Simplify right side
    3,953.12x = 20,608,904.78
  5. Step 5: Solve for x
    x = 20,608,904.78/3,953.12
  6. Step 6: Final answer
    x = 5,213.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.