Home / 28,391.52-39,179.79-15,816

Finding the Fourth Proportional to 28,391.52, 39,179.79 and 15,816

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Solution

The fourth proportional to 28,391.52, 39,179.79 and 15,816 is: 21,825.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,391.52 : 39,179.79 = 15,816 : x
  2. Step 2: Convert to fraction form
    28,391.52/39,179.79 = 15,816/x
  3. Step 3: Cross multiply
    28,391.52x = 39,179.79 × 15,816
  4. Step 4: Simplify right side
    28,391.52x = 619,667,558.64
  5. Step 5: Solve for x
    x = 619,667,558.64/28,391.52
  6. Step 6: Final answer
    x = 21,825.80

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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.