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Finding the Fourth Proportional to 21,992.40, 30,333.96 and 13,494.96

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Solution

The fourth proportional to 21,992.40, 30,333.96 and 13,494.96 is: 18,613.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,992.40 : 30,333.96 = 13,494.96 : x
  2. Step 2: Convert to fraction form
    21,992.40/30,333.96 = 13,494.96/x
  3. Step 3: Cross multiply
    21,992.40x = 30,333.96 × 13,494.96
  4. Step 4: Simplify right side
    21,992.40x = 409,355,576.84
  5. Step 5: Solve for x
    x = 409,355,576.84/21,992.40
  6. Step 6: Final answer
    x = 18,613.50

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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.