Home / 2,090.21-3,129.13-1,999.99

Finding the Fourth Proportional to 2,090.21, 3,129.13 and 1,999.99

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Solution

The fourth proportional to 2,090.21, 3,129.13 and 1,999.99 is: 2,994.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.21 : 3,129.13 = 1,999.99 : x
  2. Step 2: Convert to fraction form
    2,090.21/3,129.13 = 1,999.99/x
  3. Step 3: Cross multiply
    2,090.21x = 3,129.13 × 1,999.99
  4. Step 4: Simplify right side
    2,090.21x = 6,258,235.12
  5. Step 5: Solve for x
    x = 6,258,235.12/2,090.21
  6. Step 6: Final answer
    x = 2,994.08

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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.