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Finding the Fourth Proportional to 21,400.94, 29,532.50 and 11,968.90

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Solution

The fourth proportional to 21,400.94, 29,532.50 and 11,968.90 is: 16,516.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,400.94 : 29,532.50 = 11,968.90 : x
  2. Step 2: Convert to fraction form
    21,400.94/29,532.50 = 11,968.90/x
  3. Step 3: Cross multiply
    21,400.94x = 29,532.50 × 11,968.90
  4. Step 4: Simplify right side
    21,400.94x = 353,471,450.46
  5. Step 5: Solve for x
    x = 353,471,450.46/21,400.94
  6. Step 6: Final answer
    x = 16,516.63

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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.