Home / 18,690.11-28,035.15-12,828.95

Finding the Fourth Proportional to 18,690.11, 28,035.15 and 12,828.95

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Solution

The fourth proportional to 18,690.11, 28,035.15 and 12,828.95 is: 19,243.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.11 : 28,035.15 = 12,828.95 : x
  2. Step 2: Convert to fraction form
    18,690.11/28,035.15 = 12,828.95/x
  3. Step 3: Cross multiply
    18,690.11x = 28,035.15 × 12,828.95
  4. Step 4: Simplify right side
    18,690.11x = 359,661,537.59
  5. Step 5: Solve for x
    x = 359,661,537.59/18,690.11
  6. Step 6: Final answer
    x = 19,243.41

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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.