Home / 21,942.78-30,280.99-11,871.23

Finding the Fourth Proportional to 21,942.78, 30,280.99 and 11,871.23

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Solution

The fourth proportional to 21,942.78, 30,280.99 and 11,871.23 is: 16,382.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,942.78 : 30,280.99 = 11,871.23 : x
  2. Step 2: Convert to fraction form
    21,942.78/30,280.99 = 11,871.23/x
  3. Step 3: Cross multiply
    21,942.78x = 30,280.99 × 11,871.23
  4. Step 4: Simplify right side
    21,942.78x = 359,472,596.92
  5. Step 5: Solve for x
    x = 359,472,596.92/21,942.78
  6. Step 6: Final answer
    x = 16,382.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.