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Finding the Fourth Proportional to 22,392.33, 30,905.83 and 12,838.63

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Solution

The fourth proportional to 22,392.33, 30,905.83 and 12,838.63 is: 17,719.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,392.33 : 30,905.83 = 12,838.63 : x
  2. Step 2: Convert to fraction form
    22,392.33/30,905.83 = 12,838.63/x
  3. Step 3: Cross multiply
    22,392.33x = 30,905.83 × 12,838.63
  4. Step 4: Simplify right side
    22,392.33x = 396,788,516.21
  5. Step 5: Solve for x
    x = 396,788,516.21/22,392.33
  6. Step 6: Final answer
    x = 17,719.84

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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.