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Finding the Fourth Proportional to 21,190.56, 29,242.56 and 11,758.92

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Solution

The fourth proportional to 21,190.56, 29,242.56 and 11,758.92 is: 16,227.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.56 : 29,242.56 = 11,758.92 : x
  2. Step 2: Convert to fraction form
    21,190.56/29,242.56 = 11,758.92/x
  3. Step 3: Cross multiply
    21,190.56x = 29,242.56 × 11,758.92
  4. Step 4: Simplify right side
    21,190.56x = 343,860,923.64
  5. Step 5: Solve for x
    x = 343,860,923.64/21,190.56
  6. Step 6: Final answer
    x = 16,227.08

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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.