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Finding the Fourth Proportional to 18,906.67, 28,356.21 and 17,969.95

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Solution

The fourth proportional to 18,906.67, 28,356.21 and 17,969.95 is: 26,951.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.67 : 28,356.21 = 17,969.95 : x
  2. Step 2: Convert to fraction form
    18,906.67/28,356.21 = 17,969.95/x
  3. Step 3: Cross multiply
    18,906.67x = 28,356.21 × 17,969.95
  4. Step 4: Simplify right side
    18,906.67x = 509,559,675.89
  5. Step 5: Solve for x
    x = 509,559,675.89/18,906.67
  6. Step 6: Final answer
    x = 26,951.32

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1.5x scale

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.