Home / 21,942.99-30,281.22-11,871.36

Finding the Fourth Proportional to 21,942.99, 30,281.22 and 11,871.36

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Solution

The fourth proportional to 21,942.99, 30,281.22 and 11,871.36 is: 16,382.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,942.99 : 30,281.22 = 11,871.36 : x
  2. Step 2: Convert to fraction form
    21,942.99/30,281.22 = 11,871.36/x
  3. Step 3: Cross multiply
    21,942.99x = 30,281.22 × 11,871.36
  4. Step 4: Simplify right side
    21,942.99x = 359,479,263.86
  5. Step 5: Solve for x
    x = 359,479,263.86/21,942.99
  6. Step 6: Final answer
    x = 16,382.42

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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.