Home / 20,579.64-30,868.85-8,090.66

Finding the Fourth Proportional to 20,579.64, 30,868.85 and 8,090.66

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Solution

The fourth proportional to 20,579.64, 30,868.85 and 8,090.66 is: 12,135.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.64 : 30,868.85 = 8,090.66 : x
  2. Step 2: Convert to fraction form
    20,579.64/30,868.85 = 8,090.66/x
  3. Step 3: Cross multiply
    20,579.64x = 30,868.85 × 8,090.66
  4. Step 4: Simplify right side
    20,579.64x = 249,749,175.14
  5. Step 5: Solve for x
    x = 249,749,175.14/20,579.64
  6. Step 6: Final answer
    x = 12,135.74

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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.