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Finding the Fourth Proportional to 18,970.94, 28,470.93 and 8,589.98

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Solution

The fourth proportional to 18,970.94, 28,470.93 and 8,589.98 is: 12,891.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,970.94 : 28,470.93 = 8,589.98 : x
  2. Step 2: Convert to fraction form
    18,970.94/28,470.93 = 8,589.98/x
  3. Step 3: Cross multiply
    18,970.94x = 28,470.93 × 8,589.98
  4. Step 4: Simplify right side
    18,970.94x = 244,564,719.28
  5. Step 5: Solve for x
    x = 244,564,719.28/18,970.94
  6. Step 6: Final answer
    x = 12,891.54

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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.