Home / 3,903.90-5,387.48-2,135.63

Finding the Fourth Proportional to 3,903.90, 5,387.48 and 2,135.63

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Solution

The fourth proportional to 3,903.90, 5,387.48 and 2,135.63 is: 2,947.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,903.90 : 5,387.48 = 2,135.63 : x
  2. Step 2: Convert to fraction form
    3,903.90/5,387.48 = 2,135.63/x
  3. Step 3: Cross multiply
    3,903.90x = 5,387.48 × 2,135.63
  4. Step 4: Simplify right side
    3,903.90x = 11,505,626.30
  5. Step 5: Solve for x
    x = 11,505,626.30/3,903.90
  6. Step 6: Final answer
    x = 2,947.21

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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.