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Finding the Fourth Proportional to 21,636.63, 29,858.54 and 11,700.63

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Solution

The fourth proportional to 21,636.63, 29,858.54 and 11,700.63 is: 16,146.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,636.63 : 29,858.54 = 11,700.63 : x
  2. Step 2: Convert to fraction form
    21,636.63/29,858.54 = 11,700.63/x
  3. Step 3: Cross multiply
    21,636.63x = 29,858.54 × 11,700.63
  4. Step 4: Simplify right side
    21,636.63x = 349,363,728.88
  5. Step 5: Solve for x
    x = 349,363,728.88/21,636.63
  6. Step 6: Final answer
    x = 16,146.86

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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.