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Finding the Fourth Proportional to 21,396.64, 32,100.22 and 7,356.88

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Solution

The fourth proportional to 21,396.64, 32,100.22 and 7,356.88 is: 11,037.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,396.64 : 32,100.22 = 7,356.88 : x
  2. Step 2: Convert to fraction form
    21,396.64/32,100.22 = 7,356.88/x
  3. Step 3: Cross multiply
    21,396.64x = 32,100.22 × 7,356.88
  4. Step 4: Simplify right side
    21,396.64x = 236,157,466.51
  5. Step 5: Solve for x
    x = 236,157,466.51/21,396.64
  6. Step 6: Final answer
    x = 11,037.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.