Home / 21,325.20-31,949.49-12,555.33

Finding the Fourth Proportional to 21,325.20, 31,949.49 and 12,555.33

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Solution

The fourth proportional to 21,325.20, 31,949.49 and 12,555.33 is: 18,810.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,325.20 : 31,949.49 = 12,555.33 : x
  2. Step 2: Convert to fraction form
    21,325.20/31,949.49 = 12,555.33/x
  3. Step 3: Cross multiply
    21,325.20x = 31,949.49 × 12,555.33
  4. Step 4: Simplify right side
    21,325.20x = 401,136,167.76
  5. Step 5: Solve for x
    x = 401,136,167.76/21,325.20
  6. Step 6: Final answer
    x = 18,810.43

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