Home / 21,299.82-31,977.84-18,199.68

Finding the Fourth Proportional to 21,299.82, 31,977.84 and 18,199.68

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Solution

The fourth proportional to 21,299.82, 31,977.84 and 18,199.68 is: 27,323.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,299.82 : 31,977.84 = 18,199.68 : x
  2. Step 2: Convert to fraction form
    21,299.82/31,977.84 = 18,199.68/x
  3. Step 3: Cross multiply
    21,299.82x = 31,977.84 × 18,199.68
  4. Step 4: Simplify right side
    21,299.82x = 581,986,455.09
  5. Step 5: Solve for x
    x = 581,986,455.09/21,299.82
  6. Step 6: Final answer
    x = 27,323.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.