Home / 3,903.98-5,387.18-2,135.57

Finding the Fourth Proportional to 3,903.98, 5,387.18 and 2,135.57

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Solution

The fourth proportional to 3,903.98, 5,387.18 and 2,135.57 is: 2,946.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,903.98 : 5,387.18 = 2,135.57 : x
  2. Step 2: Convert to fraction form
    3,903.98/5,387.18 = 2,135.57/x
  3. Step 3: Cross multiply
    3,903.98x = 5,387.18 × 2,135.57
  4. Step 4: Simplify right side
    3,903.98x = 11,504,662.38
  5. Step 5: Solve for x
    x = 11,504,662.38/3,903.98
  6. Step 6: Final answer
    x = 2,946.91

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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.