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Finding the Fourth Proportional to 21,353.64, 29,468.01 and 11,922.19

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Solution

The fourth proportional to 21,353.64, 29,468.01 and 11,922.19 is: 16,452.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,353.64 : 29,468.01 = 11,922.19 : x
  2. Step 2: Convert to fraction form
    21,353.64/29,468.01 = 11,922.19/x
  3. Step 3: Cross multiply
    21,353.64x = 29,468.01 × 11,922.19
  4. Step 4: Simplify right side
    21,353.64x = 351,323,214.14
  5. Step 5: Solve for x
    x = 351,323,214.14/21,353.64
  6. Step 6: Final answer
    x = 16,452.61

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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.