Home / 21,218.04-29,300.58-13,682

Finding the Fourth Proportional to 21,218.04, 29,300.58 and 13,682

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Solution

The fourth proportional to 21,218.04, 29,300.58 and 13,682 is: 18,893.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.04 : 29,300.58 = 13,682 : x
  2. Step 2: Convert to fraction form
    21,218.04/29,300.58 = 13,682/x
  3. Step 3: Cross multiply
    21,218.04x = 29,300.58 × 13,682
  4. Step 4: Simplify right side
    21,218.04x = 400,890,535.56
  5. Step 5: Solve for x
    x = 400,890,535.56/21,218.04
  6. Step 6: Final answer
    x = 18,893.85

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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.