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Finding the Fourth Proportional to 18,940.95, 28,415.49 and 5,792.88

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Solution

The fourth proportional to 18,940.95, 28,415.49 and 5,792.88 is: 8,690.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.95 : 28,415.49 = 5,792.88 : x
  2. Step 2: Convert to fraction form
    18,940.95/28,415.49 = 5,792.88/x
  3. Step 3: Cross multiply
    18,940.95x = 28,415.49 × 5,792.88
  4. Step 4: Simplify right side
    18,940.95x = 164,607,523.71
  5. Step 5: Solve for x
    x = 164,607,523.71/18,940.95
  6. Step 6: Final answer
    x = 8,690.56

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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.