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Finding the Fourth Proportional to 12,261.32, 18,391.99 and 3,942.07

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Solution

The fourth proportional to 12,261.32, 18,391.99 and 3,942.07 is: 5,913.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,261.32 : 18,391.99 = 3,942.07 : x
  2. Step 2: Convert to fraction form
    12,261.32/18,391.99 = 3,942.07/x
  3. Step 3: Cross multiply
    12,261.32x = 18,391.99 × 3,942.07
  4. Step 4: Simplify right side
    12,261.32x = 72,502,452.49
  5. Step 5: Solve for x
    x = 72,502,452.49/12,261.32
  6. Step 6: Final answer
    x = 5,913.10

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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.