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Finding the Fourth Proportional to 12,018.96, 18,028.96 and 4,228.88

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Solution

The fourth proportional to 12,018.96, 18,028.96 and 4,228.88 is: 6,343.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,018.96 : 18,028.96 = 4,228.88 : x
  2. Step 2: Convert to fraction form
    12,018.96/18,028.96 = 4,228.88/x
  3. Step 3: Cross multiply
    12,018.96x = 18,028.96 × 4,228.88
  4. Step 4: Simplify right side
    12,018.96x = 76,242,308.36
  5. Step 5: Solve for x
    x = 76,242,308.36/12,018.96
  6. Step 6: Final answer
    x = 6,343.50

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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.