Home / 12,021.78-18,020.51-5,772.66

Finding the Fourth Proportional to 12,021.78, 18,020.51 and 5,772.66

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Solution

The fourth proportional to 12,021.78, 18,020.51 and 5,772.66 is: 8,653.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,021.78 : 18,020.51 = 5,772.66 : x
  2. Step 2: Convert to fraction form
    12,021.78/18,020.51 = 5,772.66/x
  3. Step 3: Cross multiply
    12,021.78x = 18,020.51 × 5,772.66
  4. Step 4: Simplify right side
    12,021.78x = 104,026,277.26
  5. Step 5: Solve for x
    x = 104,026,277.26/12,021.78
  6. Step 6: Final answer
    x = 8,653.15

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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.