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Finding the Fourth Proportional to 21,241.60, 29,313.60 and 11,809.92

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Solution

The fourth proportional to 21,241.60, 29,313.60 and 11,809.92 is: 16,297.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,241.60 : 29,313.60 = 11,809.92 : x
  2. Step 2: Convert to fraction form
    21,241.60/29,313.60 = 11,809.92/x
  3. Step 3: Cross multiply
    21,241.60x = 29,313.60 × 11,809.92
  4. Step 4: Simplify right side
    21,241.60x = 346,191,270.91
  5. Step 5: Solve for x
    x = 346,191,270.91/21,241.60
  6. Step 6: Final answer
    x = 16,297.80

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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.