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Finding the Fourth Proportional to 21,879.68, 30,194.04 and 11,943.68

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Solution

The fourth proportional to 21,879.68, 30,194.04 and 11,943.68 is: 16,482.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.68 : 30,194.04 = 11,943.68 : x
  2. Step 2: Convert to fraction form
    21,879.68/30,194.04 = 11,943.68/x
  3. Step 3: Cross multiply
    21,879.68x = 30,194.04 × 11,943.68
  4. Step 4: Simplify right side
    21,879.68x = 360,627,951.67
  5. Step 5: Solve for x
    x = 360,627,951.67/21,879.68
  6. Step 6: Final answer
    x = 16,482.32

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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.