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Finding the Fourth Proportional to 28,409.80, 42,620.86 and 10,879.63

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Solution

The fourth proportional to 28,409.80, 42,620.86 and 10,879.63 is: 16,321.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.80 : 42,620.86 = 10,879.63 : x
  2. Step 2: Convert to fraction form
    28,409.80/42,620.86 = 10,879.63/x
  3. Step 3: Cross multiply
    28,409.80x = 42,620.86 × 10,879.63
  4. Step 4: Simplify right side
    28,409.80x = 463,699,187.08
  5. Step 5: Solve for x
    x = 463,699,187.08/28,409.80
  6. Step 6: Final answer
    x = 16,321.80

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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.