Home / 3,728.76-5,145.82-2,135.70

Finding the Fourth Proportional to 3,728.76, 5,145.82 and 2,135.70

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Solution

The fourth proportional to 3,728.76, 5,145.82 and 2,135.70 is: 2,947.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.76 : 5,145.82 = 2,135.70 : x
  2. Step 2: Convert to fraction form
    3,728.76/5,145.82 = 2,135.70/x
  3. Step 3: Cross multiply
    3,728.76x = 5,145.82 × 2,135.70
  4. Step 4: Simplify right side
    3,728.76x = 10,989,927.77
  5. Step 5: Solve for x
    x = 10,989,927.77/3,728.76
  6. Step 6: Final answer
    x = 2,947.34

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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.