Home / 3,987.60-5,991.96-2,140.08

Finding the Fourth Proportional to 3,987.60, 5,991.96 and 2,140.08

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Solution

The fourth proportional to 3,987.60, 5,991.96 and 2,140.08 is: 3,215.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.60 : 5,991.96 = 2,140.08 : x
  2. Step 2: Convert to fraction form
    3,987.60/5,991.96 = 2,140.08/x
  3. Step 3: Cross multiply
    3,987.60x = 5,991.96 × 2,140.08
  4. Step 4: Simplify right side
    3,987.60x = 12,823,273.76
  5. Step 5: Solve for x
    x = 12,823,273.76/3,987.60
  6. Step 6: Final answer
    x = 3,215.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.