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Finding the Fourth Proportional to 21,394.99, 29,525.29 and 11,834.40

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Solution

The fourth proportional to 21,394.99, 29,525.29 and 11,834.40 is: 16,331.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,394.99 : 29,525.29 = 11,834.40 : x
  2. Step 2: Convert to fraction form
    21,394.99/29,525.29 = 11,834.40/x
  3. Step 3: Cross multiply
    21,394.99x = 29,525.29 × 11,834.40
  4. Step 4: Simplify right side
    21,394.99x = 349,414,091.98
  5. Step 5: Solve for x
    x = 349,414,091.98/21,394.99
  6. Step 6: Final answer
    x = 16,331.58

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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.