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Finding the Fourth Proportional to 22,043.70, 30,420.18 and 11,972.07

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Solution

The fourth proportional to 22,043.70, 30,420.18 and 11,972.07 is: 16,521.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,043.70 : 30,420.18 = 11,972.07 : x
  2. Step 2: Convert to fraction form
    22,043.70/30,420.18 = 11,972.07/x
  3. Step 3: Cross multiply
    22,043.70x = 30,420.18 × 11,972.07
  4. Step 4: Simplify right side
    22,043.70x = 364,192,524.37
  5. Step 5: Solve for x
    x = 364,192,524.37/22,043.70
  6. Step 6: Final answer
    x = 16,521.39

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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.