Home / 21,020.94-31,438.44-18,697.26

Finding the Fourth Proportional to 21,020.94, 31,438.44 and 18,697.26

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Solution

The fourth proportional to 21,020.94, 31,438.44 and 18,697.26 is: 27,963.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020.94 : 31,438.44 = 18,697.26 : x
  2. Step 2: Convert to fraction form
    21,020.94/31,438.44 = 18,697.26/x
  3. Step 3: Cross multiply
    21,020.94x = 31,438.44 × 18,697.26
  4. Step 4: Simplify right side
    21,020.94x = 587,812,686.67
  5. Step 5: Solve for x
    x = 587,812,686.67/21,020.94
  6. Step 6: Final answer
    x = 27,963.20

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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.