Home / 12,824.21-19,238.81-5,428.64

Finding the Fourth Proportional to 12,824.21, 19,238.81 and 5,428.64

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Solution

The fourth proportional to 12,824.21, 19,238.81 and 5,428.64 is: 8,144.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,824.21 : 19,238.81 = 5,428.64 : x
  2. Step 2: Convert to fraction form
    12,824.21/19,238.81 = 5,428.64/x
  3. Step 3: Cross multiply
    12,824.21x = 19,238.81 × 5,428.64
  4. Step 4: Simplify right side
    12,824.21x = 104,440,450.18
  5. Step 5: Solve for x
    x = 104,440,450.18/12,824.21
  6. Step 6: Final answer
    x = 8,144.01

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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.