Home / 3,987.28-5,504.52-2,809.36

Finding the Fourth Proportional to 3,987.28, 5,504.52 and 2,809.36

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Solution

The fourth proportional to 3,987.28, 5,504.52 and 2,809.36 is: 3,878.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.28 : 5,504.52 = 2,809.36 : x
  2. Step 2: Convert to fraction form
    3,987.28/5,504.52 = 2,809.36/x
  3. Step 3: Cross multiply
    3,987.28x = 5,504.52 × 2,809.36
  4. Step 4: Simplify right side
    3,987.28x = 15,464,178.31
  5. Step 5: Solve for x
    x = 15,464,178.31/3,987.28
  6. Step 6: Final answer
    x = 3,878.38

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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.