Home / 21,983.15-30,336.70-11,911.86

Finding the Fourth Proportional to 21,983.15, 30,336.70 and 11,911.86

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Solution

The fourth proportional to 21,983.15, 30,336.70 and 11,911.86 is: 16,438.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,983.15 : 30,336.70 = 11,911.86 : x
  2. Step 2: Convert to fraction form
    21,983.15/30,336.70 = 11,911.86/x
  3. Step 3: Cross multiply
    21,983.15x = 30,336.70 × 11,911.86
  4. Step 4: Simplify right side
    21,983.15x = 361,366,607.24
  5. Step 5: Solve for x
    x = 361,366,607.24/21,983.15
  6. Step 6: Final answer
    x = 16,438.35

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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.