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Finding the Fourth Proportional to 21,599.16, 29,817.90 and 13,649.64

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Solution

The fourth proportional to 21,599.16, 29,817.90 and 13,649.64 is: 18,843.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,599.16 : 29,817.90 = 13,649.64 : x
  2. Step 2: Convert to fraction form
    21,599.16/29,817.90 = 13,649.64/x
  3. Step 3: Cross multiply
    21,599.16x = 29,817.90 × 13,649.64
  4. Step 4: Simplify right side
    21,599.16x = 407,003,600.56
  5. Step 5: Solve for x
    x = 407,003,600.56/21,599.16
  6. Step 6: Final answer
    x = 18,843.49

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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.