Home / 12,240.36-18,361.74-3,918.28

Finding the Fourth Proportional to 12,240.36, 18,361.74 and 3,918.28

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Solution

The fourth proportional to 12,240.36, 18,361.74 and 3,918.28 is: 5,877.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,240.36 : 18,361.74 = 3,918.28 : x
  2. Step 2: Convert to fraction form
    12,240.36/18,361.74 = 3,918.28/x
  3. Step 3: Cross multiply
    12,240.36x = 18,361.74 × 3,918.28
  4. Step 4: Simplify right side
    12,240.36x = 71,946,438.61
  5. Step 5: Solve for x
    x = 71,946,438.61/12,240.36
  6. Step 6: Final answer
    x = 5,877.80

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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.