Home / 28,728.12-39,631.50-16,791.96

Finding the Fourth Proportional to 28,728.12, 39,631.50 and 16,791.96

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Solution

The fourth proportional to 28,728.12, 39,631.50 and 16,791.96 is: 23,165.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,728.12 : 39,631.50 = 16,791.96 : x
  2. Step 2: Convert to fraction form
    28,728.12/39,631.50 = 16,791.96/x
  3. Step 3: Cross multiply
    28,728.12x = 39,631.50 × 16,791.96
  4. Step 4: Simplify right side
    28,728.12x = 665,490,562.74
  5. Step 5: Solve for x
    x = 665,490,562.74/28,728.12
  6. Step 6: Final answer
    x = 23,165.13

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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.