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Finding the Fourth Proportional to 21,596.36, 32,394.53 and 12,355.88

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Solution

The fourth proportional to 21,596.36, 32,394.53 and 12,355.88 is: 18,533.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,596.36 : 32,394.53 = 12,355.88 : x
  2. Step 2: Convert to fraction form
    21,596.36/32,394.53 = 12,355.88/x
  3. Step 3: Cross multiply
    21,596.36x = 32,394.53 × 12,355.88
  4. Step 4: Simplify right side
    21,596.36x = 400,262,794.25
  5. Step 5: Solve for x
    x = 400,262,794.25/21,596.36
  6. Step 6: Final answer
    x = 18,533.81

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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.