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Finding the Fourth Proportional to 28,898, 39,879.24 and 15,650

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Solution

The fourth proportional to 28,898, 39,879.24 and 15,650 is: 21,597

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,898 : 39,879.24 = 15,650 : x
  2. Step 2: Convert to fraction form
    28,898/39,879.24 = 15,650/x
  3. Step 3: Cross multiply
    28,898x = 39,879.24 × 15,650
  4. Step 4: Simplify right side
    28,898x = 624,110,106
  5. Step 5: Solve for x
    x = 624,110,106/28,898
  6. Step 6: Final answer
    x = 21,597

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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.