Home / 12,138.02-18,195.20-6,214.90

Finding the Fourth Proportional to 12,138.02, 18,195.20 and 6,214.90

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Solution

The fourth proportional to 12,138.02, 18,195.20 and 6,214.90 is: 9,316.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.02 : 18,195.20 = 6,214.90 : x
  2. Step 2: Convert to fraction form
    12,138.02/18,195.20 = 6,214.90/x
  3. Step 3: Cross multiply
    12,138.02x = 18,195.20 × 6,214.90
  4. Step 4: Simplify right side
    12,138.02x = 113,081,348.48
  5. Step 5: Solve for x
    x = 113,081,348.48/12,138.02
  6. Step 6: Final answer
    x = 9,316.29

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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.