Home / 20,835.11-28,729.53-13,272.95

Finding the Fourth Proportional to 20,835.11, 28,729.53 and 13,272.95

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Solution

The fourth proportional to 20,835.11, 28,729.53 and 13,272.95 is: 18,302.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.11 : 28,729.53 = 13,272.95 : x
  2. Step 2: Convert to fraction form
    20,835.11/28,729.53 = 13,272.95/x
  3. Step 3: Cross multiply
    20,835.11x = 28,729.53 × 13,272.95
  4. Step 4: Simplify right side
    20,835.11x = 381,325,471.57
  5. Step 5: Solve for x
    x = 381,325,471.57/20,835.11
  6. Step 6: Final answer
    x = 18,302.07

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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.