Home / 12,021.78-18,032.69-4,228.78

Finding the Fourth Proportional to 12,021.78, 18,032.69 and 4,228.78

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Solution

The fourth proportional to 12,021.78, 18,032.69 and 4,228.78 is: 6,343.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,021.78 : 18,032.69 = 4,228.78 : x
  2. Step 2: Convert to fraction form
    12,021.78/18,032.69 = 4,228.78/x
  3. Step 3: Cross multiply
    12,021.78x = 18,032.69 × 4,228.78
  4. Step 4: Simplify right side
    12,021.78x = 76,256,278.82
  5. Step 5: Solve for x
    x = 76,256,278.82/12,021.78
  6. Step 6: Final answer
    x = 6,343.18

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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.