Home / 21,138.89-31,723.71-17,028.52

Finding the Fourth Proportional to 21,138.89, 31,723.71 and 17,028.52

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Solution

The fourth proportional to 21,138.89, 31,723.71 and 17,028.52 is: 25,555.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.89 : 31,723.71 = 17,028.52 : x
  2. Step 2: Convert to fraction form
    21,138.89/31,723.71 = 17,028.52/x
  3. Step 3: Cross multiply
    21,138.89x = 31,723.71 × 17,028.52
  4. Step 4: Simplify right side
    21,138.89x = 540,207,830.21
  5. Step 5: Solve for x
    x = 540,207,830.21/21,138.89
  6. Step 6: Final answer
    x = 25,555.17

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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.