Home / 12,090.78-18,136.16-3,771.46

Finding the Fourth Proportional to 12,090.78, 18,136.16 and 3,771.46

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Solution

The fourth proportional to 12,090.78, 18,136.16 and 3,771.46 is: 5,657.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,090.78 : 18,136.16 = 3,771.46 : x
  2. Step 2: Convert to fraction form
    12,090.78/18,136.16 = 3,771.46/x
  3. Step 3: Cross multiply
    12,090.78x = 18,136.16 × 3,771.46
  4. Step 4: Simplify right side
    12,090.78x = 68,399,801.99
  5. Step 5: Solve for x
    x = 68,399,801.99/12,090.78
  6. Step 6: Final answer
    x = 5,657.19

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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.