Home / 21,529.28-29,710.82-11,969.96

Finding the Fourth Proportional to 21,529.28, 29,710.82 and 11,969.96

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Solution

The fourth proportional to 21,529.28, 29,710.82 and 11,969.96 is: 16,518.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,529.28 : 29,710.82 = 11,969.96 : x
  2. Step 2: Convert to fraction form
    21,529.28/29,710.82 = 11,969.96/x
  3. Step 3: Cross multiply
    21,529.28x = 29,710.82 × 11,969.96
  4. Step 4: Simplify right side
    21,529.28x = 355,637,431.17
  5. Step 5: Solve for x
    x = 355,637,431.17/21,529.28
  6. Step 6: Final answer
    x = 16,518.78

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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.