Home / 21,982.90-30,336.43-11,911.34

Finding the Fourth Proportional to 21,982.90, 30,336.43 and 11,911.34

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Solution

The fourth proportional to 21,982.90, 30,336.43 and 11,911.34 is: 16,437.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,982.90 : 30,336.43 = 11,911.34 : x
  2. Step 2: Convert to fraction form
    21,982.90/30,336.43 = 11,911.34/x
  3. Step 3: Cross multiply
    21,982.90x = 30,336.43 × 11,911.34
  4. Step 4: Simplify right side
    21,982.90x = 361,347,509.08
  5. Step 5: Solve for x
    x = 361,347,509.08/21,982.90
  6. Step 6: Final answer
    x = 16,437.66

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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.