Home / 21,529.57-29,711.31-11,969.75

Finding the Fourth Proportional to 21,529.57, 29,711.31 and 11,969.75

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Solution

The fourth proportional to 21,529.57, 29,711.31 and 11,969.75 is: 16,518.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,529.57 : 29,711.31 = 11,969.75 : x
  2. Step 2: Convert to fraction form
    21,529.57/29,711.31 = 11,969.75/x
  3. Step 3: Cross multiply
    21,529.57x = 29,711.31 × 11,969.75
  4. Step 4: Simplify right side
    21,529.57x = 355,636,804.32
  5. Step 5: Solve for x
    x = 355,636,804.32/21,529.57
  6. Step 6: Final answer
    x = 16,518.53

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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.