Home / 3,728.40-5,145.26-2,135.05

Finding the Fourth Proportional to 3,728.40, 5,145.26 and 2,135.05

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Solution

The fourth proportional to 3,728.40, 5,145.26 and 2,135.05 is: 2,946.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.40 : 5,145.26 = 2,135.05 : x
  2. Step 2: Convert to fraction form
    3,728.40/5,145.26 = 2,135.05/x
  3. Step 3: Cross multiply
    3,728.40x = 5,145.26 × 2,135.05
  4. Step 4: Simplify right side
    3,728.40x = 10,985,387.36
  5. Step 5: Solve for x
    x = 10,985,387.36/3,728.40
  6. Step 6: Final answer
    x = 2,946.41

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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.