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Finding the Fourth Proportional to 28,409.88, 42,620.96 and 10,879.70

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Solution

The fourth proportional to 28,409.88, 42,620.96 and 10,879.70 is: 16,321.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.88 : 42,620.96 = 10,879.70 : x
  2. Step 2: Convert to fraction form
    28,409.88/42,620.96 = 10,879.70/x
  3. Step 3: Cross multiply
    28,409.88x = 42,620.96 × 10,879.70
  4. Step 4: Simplify right side
    28,409.88x = 463,703,258.51
  5. Step 5: Solve for x
    x = 463,703,258.51/28,409.88
  6. Step 6: Final answer
    x = 16,321.90

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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.