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Finding the Fourth Proportional to 14,618.70, 21,879.45 and 12,869.10

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Solution

The fourth proportional to 14,618.70, 21,879.45 and 12,869.10 is: 19,260.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,618.70 : 21,879.45 = 12,869.10 : x
  2. Step 2: Convert to fraction form
    14,618.70/21,879.45 = 12,869.10/x
  3. Step 3: Cross multiply
    14,618.70x = 21,879.45 × 12,869.10
  4. Step 4: Simplify right side
    14,618.70x = 281,568,830.00
  5. Step 5: Solve for x
    x = 281,568,830.00/14,618.70
  6. Step 6: Final answer
    x = 19,260.87

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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.