Home / 3,903.78-5,387.06-2,135.45

Finding the Fourth Proportional to 3,903.78, 5,387.06 and 2,135.45

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Solution

The fourth proportional to 3,903.78, 5,387.06 and 2,135.45 is: 2,946.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,903.78 : 5,387.06 = 2,135.45 : x
  2. Step 2: Convert to fraction form
    3,903.78/5,387.06 = 2,135.45/x
  3. Step 3: Cross multiply
    3,903.78x = 5,387.06 × 2,135.45
  4. Step 4: Simplify right side
    3,903.78x = 11,503,797.28
  5. Step 5: Solve for x
    x = 11,503,797.28/3,903.78
  6. Step 6: Final answer
    x = 2,946.84

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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.