Home / 8,090.78-12,138.20-2,543.90

Finding the Fourth Proportional to 8,090.78, 12,138.20 and 2,543.90

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Solution

The fourth proportional to 8,090.78, 12,138.20 and 2,543.90 is: 3,816.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,090.78 : 12,138.20 = 2,543.90 : x
  2. Step 2: Convert to fraction form
    8,090.78/12,138.20 = 2,543.90/x
  3. Step 3: Cross multiply
    8,090.78x = 12,138.20 × 2,543.90
  4. Step 4: Simplify right side
    8,090.78x = 30,878,354.26
  5. Step 5: Solve for x
    x = 30,878,354.26/8,090.78
  6. Step 6: Final answer
    x = 3,816.49

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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.