Home / 20,871.74-31,315.31-9,782.03

Finding the Fourth Proportional to 20,871.74, 31,315.31 and 9,782.03

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Solution

The fourth proportional to 20,871.74, 31,315.31 and 9,782.03 is: 14,676.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.74 : 31,315.31 = 9,782.03 : x
  2. Step 2: Convert to fraction form
    20,871.74/31,315.31 = 9,782.03/x
  3. Step 3: Cross multiply
    20,871.74x = 31,315.31 × 9,782.03
  4. Step 4: Simplify right side
    20,871.74x = 306,327,367.94
  5. Step 5: Solve for x
    x = 306,327,367.94/20,871.74
  6. Step 6: Final answer
    x = 14,676.66

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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.