Home / 28,436.52-39,243.24-15,861

Finding the Fourth Proportional to 28,436.52, 39,243.24 and 15,861

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Solution

The fourth proportional to 28,436.52, 39,243.24 and 15,861 is: 21,888.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,436.52 : 39,243.24 = 15,861 : x
  2. Step 2: Convert to fraction form
    28,436.52/39,243.24 = 15,861/x
  3. Step 3: Cross multiply
    28,436.52x = 39,243.24 × 15,861
  4. Step 4: Simplify right side
    28,436.52x = 622,437,029.64
  5. Step 5: Solve for x
    x = 622,437,029.64/28,436.52
  6. Step 6: Final answer
    x = 21,888.65

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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.