Home / 3,728.47-5,145.30-2,135.14

Finding the Fourth Proportional to 3,728.47, 5,145.30 and 2,135.14

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Solution

The fourth proportional to 3,728.47, 5,145.30 and 2,135.14 is: 2,946.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.47 : 5,145.30 = 2,135.14 : x
  2. Step 2: Convert to fraction form
    3,728.47/5,145.30 = 2,135.14/x
  3. Step 3: Cross multiply
    3,728.47x = 5,145.30 × 2,135.14
  4. Step 4: Simplify right side
    3,728.47x = 10,985,914.97
  5. Step 5: Solve for x
    x = 10,985,914.97/3,728.47
  6. Step 6: Final answer
    x = 2,946.50

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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.