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Finding the Fourth Proportional to 18,935.95, 28,403.52 and 5,084.95

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Solution

The fourth proportional to 18,935.95, 28,403.52 and 5,084.95 is: 7,627.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,935.95 : 28,403.52 = 5,084.95 : x
  2. Step 2: Convert to fraction form
    18,935.95/28,403.52 = 5,084.95/x
  3. Step 3: Cross multiply
    18,935.95x = 28,403.52 × 5,084.95
  4. Step 4: Simplify right side
    18,935.95x = 144,430,479.02
  5. Step 5: Solve for x
    x = 144,430,479.02/18,935.95
  6. Step 6: Final answer
    x = 7,627.32

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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.