Home / 21,222.74-31,819.01-9,971.79

Finding the Fourth Proportional to 21,222.74, 31,819.01 and 9,971.79

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Solution

The fourth proportional to 21,222.74, 31,819.01 and 9,971.79 is: 14,950.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,222.74 : 31,819.01 = 9,971.79 : x
  2. Step 2: Convert to fraction form
    21,222.74/31,819.01 = 9,971.79/x
  3. Step 3: Cross multiply
    21,222.74x = 31,819.01 × 9,971.79
  4. Step 4: Simplify right side
    21,222.74x = 317,292,435.87
  5. Step 5: Solve for x
    x = 317,292,435.87/21,222.74
  6. Step 6: Final answer
    x = 14,950.59

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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.