Home / 21,989.12-32,977.92-10,290.56

Finding the Fourth Proportional to 21,989.12, 32,977.92 and 10,290.56

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Solution

The fourth proportional to 21,989.12, 32,977.92 and 10,290.56 is: 15,433.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.12 : 32,977.92 = 10,290.56 : x
  2. Step 2: Convert to fraction form
    21,989.12/32,977.92 = 10,290.56/x
  3. Step 3: Cross multiply
    21,989.12x = 32,977.92 × 10,290.56
  4. Step 4: Simplify right side
    21,989.12x = 339,361,264.44
  5. Step 5: Solve for x
    x = 339,361,264.44/21,989.12
  6. Step 6: Final answer
    x = 15,433.14

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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.