Home / 21,860.23-32,790.31-8,721.82

Finding the Fourth Proportional to 21,860.23, 32,790.31 and 8,721.82

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Solution

The fourth proportional to 21,860.23, 32,790.31 and 8,721.82 is: 13,082.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,860.23 : 32,790.31 = 8,721.82 : x
  2. Step 2: Convert to fraction form
    21,860.23/32,790.31 = 8,721.82/x
  3. Step 3: Cross multiply
    21,860.23x = 32,790.31 × 8,721.82
  4. Step 4: Simplify right side
    21,860.23x = 285,991,271.39
  5. Step 5: Solve for x
    x = 285,991,271.39/21,860.23
  6. Step 6: Final answer
    x = 13,082.72

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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.