Home / 3,903.79-5,387.34-2,135.52

Finding the Fourth Proportional to 3,903.79, 5,387.34 and 2,135.52

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Solution

The fourth proportional to 3,903.79, 5,387.34 and 2,135.52 is: 2,947.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,903.79 : 5,387.34 = 2,135.52 : x
  2. Step 2: Convert to fraction form
    3,903.79/5,387.34 = 2,135.52/x
  3. Step 3: Cross multiply
    3,903.79x = 5,387.34 × 2,135.52
  4. Step 4: Simplify right side
    3,903.79x = 11,504,772.32
  5. Step 5: Solve for x
    x = 11,504,772.32/3,903.79
  6. Step 6: Final answer
    x = 2,947.08

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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.