Home / 21,290.11-29,380.67-12,216.95

Finding the Fourth Proportional to 21,290.11, 29,380.67 and 12,216.95

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Solution

The fourth proportional to 21,290.11, 29,380.67 and 12,216.95 is: 16,859.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.11 : 29,380.67 = 12,216.95 : x
  2. Step 2: Convert to fraction form
    21,290.11/29,380.67 = 12,216.95/x
  3. Step 3: Cross multiply
    21,290.11x = 29,380.67 × 12,216.95
  4. Step 4: Simplify right side
    21,290.11x = 358,942,176.36
  5. Step 5: Solve for x
    x = 358,942,176.36/21,290.11
  6. Step 6: Final answer
    x = 16,859.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.