Home / 3,987.21-5,503.05-2,308.35

Finding the Fourth Proportional to 3,987.21, 5,503.05 and 2,308.35

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Solution

The fourth proportional to 3,987.21, 5,503.05 and 2,308.35 is: 3,185.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.21 : 5,503.05 = 2,308.35 : x
  2. Step 2: Convert to fraction form
    3,987.21/5,503.05 = 2,308.35/x
  3. Step 3: Cross multiply
    3,987.21x = 5,503.05 × 2,308.35
  4. Step 4: Simplify right side
    3,987.21x = 12,702,965.47
  5. Step 5: Solve for x
    x = 12,702,965.47/3,987.21
  6. Step 6: Final answer
    x = 3,185.93

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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.