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Finding the Fourth Proportional to 21,770.92, 30,045.72 and 12,338.92

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Solution

The fourth proportional to 21,770.92, 30,045.72 and 12,338.92 is: 17,028.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,770.92 : 30,045.72 = 12,338.92 : x
  2. Step 2: Convert to fraction form
    21,770.92/30,045.72 = 12,338.92/x
  3. Step 3: Cross multiply
    21,770.92x = 30,045.72 × 12,338.92
  4. Step 4: Simplify right side
    21,770.92x = 370,731,735.42
  5. Step 5: Solve for x
    x = 370,731,735.42/21,770.92
  6. Step 6: Final answer
    x = 17,028.76

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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.