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Finding the Fourth Proportional to 21,605.60, 29,806.96 and 13,226.96

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Solution

The fourth proportional to 21,605.60, 29,806.96 and 13,226.96 is: 18,247.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,605.60 : 29,806.96 = 13,226.96 : x
  2. Step 2: Convert to fraction form
    21,605.60/29,806.96 = 13,226.96/x
  3. Step 3: Cross multiply
    21,605.60x = 29,806.96 × 13,226.96
  4. Step 4: Simplify right side
    21,605.60x = 394,255,467.64
  5. Step 5: Solve for x
    x = 394,255,467.64/21,605.60
  6. Step 6: Final answer
    x = 18,247.84

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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.