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Finding the Fourth Proportional to 21,964.54, 30,311.08 and 11,893.08

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Solution

The fourth proportional to 21,964.54, 30,311.08 and 11,893.08 is: 16,412.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,964.54 : 30,311.08 = 11,893.08 : x
  2. Step 2: Convert to fraction form
    21,964.54/30,311.08 = 11,893.08/x
  3. Step 3: Cross multiply
    21,964.54x = 30,311.08 × 11,893.08
  4. Step 4: Simplify right side
    21,964.54x = 360,492,099.33
  5. Step 5: Solve for x
    x = 360,492,099.33/21,964.54
  6. Step 6: Final answer
    x = 16,412.46

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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.