Home / 21,290.12-31,906.88-11,292.81

Finding the Fourth Proportional to 21,290.12, 31,906.88 and 11,292.81

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Solution

The fourth proportional to 21,290.12, 31,906.88 and 11,292.81 is: 16,924.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.12 : 31,906.88 = 11,292.81 : x
  2. Step 2: Convert to fraction form
    21,290.12/31,906.88 = 11,292.81/x
  3. Step 3: Cross multiply
    21,290.12x = 31,906.88 × 11,292.81
  4. Step 4: Simplify right side
    21,290.12x = 360,318,174.00
  5. Step 5: Solve for x
    x = 360,318,174.00/21,290.12
  6. Step 6: Final answer
    x = 16,924.20

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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.