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Finding the Fourth Proportional to 28,550.81, 39,400.17 and 15,804.88

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Solution

The fourth proportional to 28,550.81, 39,400.17 and 15,804.88 is: 21,810.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,550.81 : 39,400.17 = 15,804.88 : x
  2. Step 2: Convert to fraction form
    28,550.81/39,400.17 = 15,804.88/x
  3. Step 3: Cross multiply
    28,550.81x = 39,400.17 × 15,804.88
  4. Step 4: Simplify right side
    28,550.81x = 622,714,958.83
  5. Step 5: Solve for x
    x = 622,714,958.83/28,550.81
  6. Step 6: Final answer
    x = 21,810.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.