Home / 21,983.29-30,336.93-11,911.79

Finding the Fourth Proportional to 21,983.29, 30,336.93 and 11,911.79

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Solution

The fourth proportional to 21,983.29, 30,336.93 and 11,911.79 is: 16,438.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,983.29 : 30,336.93 = 11,911.79 : x
  2. Step 2: Convert to fraction form
    21,983.29/30,336.93 = 11,911.79/x
  3. Step 3: Cross multiply
    21,983.29x = 30,336.93 × 11,911.79
  4. Step 4: Simplify right side
    21,983.29x = 361,367,215.25
  5. Step 5: Solve for x
    x = 361,367,215.25/21,983.29
  6. Step 6: Final answer
    x = 16,438.27

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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.