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Finding the Fourth Proportional to 28,651.34, 42,976.34 and 16,879.76

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Solution

The fourth proportional to 28,651.34, 42,976.34 and 16,879.76 is: 25,319.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,651.34 : 42,976.34 = 16,879.76 : x
  2. Step 2: Convert to fraction form
    28,651.34/42,976.34 = 16,879.76/x
  3. Step 3: Cross multiply
    28,651.34x = 42,976.34 × 16,879.76
  4. Step 4: Simplify right side
    28,651.34x = 725,430,304.88
  5. Step 5: Solve for x
    x = 725,430,304.88/28,651.34
  6. Step 6: Final answer
    x = 25,319.25

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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.