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Finding the Fourth Proportional to 8,628, 12,879.05 and 7,403.28

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Solution

The fourth proportional to 8,628, 12,879.05 and 7,403.28 is: 11,050.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628 : 12,879.05 = 7,403.28 : x
  2. Step 2: Convert to fraction form
    8,628/12,879.05 = 7,403.28/x
  3. Step 3: Cross multiply
    8,628x = 12,879.05 × 7,403.28
  4. Step 4: Simplify right side
    8,628x = 95,347,176.27
  5. Step 5: Solve for x
    x = 95,347,176.27/8,628
  6. Step 6: Final answer
    x = 11,050.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.