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Finding the Fourth Proportional to 21,299.98, 29,394 and 12,352.69

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Solution

The fourth proportional to 21,299.98, 29,394 and 12,352.69 is: 17,046.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,299.98 : 29,394 = 12,352.69 : x
  2. Step 2: Convert to fraction form
    21,299.98/29,394 = 12,352.69/x
  3. Step 3: Cross multiply
    21,299.98x = 29,394 × 12,352.69
  4. Step 4: Simplify right side
    21,299.98x = 363,094,969.86
  5. Step 5: Solve for x
    x = 363,094,969.86/21,299.98
  6. Step 6: Final answer
    x = 17,046.73

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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.