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Finding the Fourth Proportional to 21,602.63, 29,811.63 and 11,666.63

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Solution

The fourth proportional to 21,602.63, 29,811.63 and 11,666.63 is: 16,099.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,602.63 : 29,811.63 = 11,666.63 : x
  2. Step 2: Convert to fraction form
    21,602.63/29,811.63 = 11,666.63/x
  3. Step 3: Cross multiply
    21,602.63x = 29,811.63 × 11,666.63
  4. Step 4: Simplify right side
    21,602.63x = 347,801,107.85
  5. Step 5: Solve for x
    x = 347,801,107.85/21,602.63
  6. Step 6: Final answer
    x = 16,099.95

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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.