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Finding the Fourth Proportional to 28,243.50, 38,976.03 and 15,668.34

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Solution

The fourth proportional to 28,243.50, 38,976.03 and 15,668.34 is: 21,622.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,243.50 : 38,976.03 = 15,668.34 : x
  2. Step 2: Convert to fraction form
    28,243.50/38,976.03 = 15,668.34/x
  3. Step 3: Cross multiply
    28,243.50x = 38,976.03 × 15,668.34
  4. Step 4: Simplify right side
    28,243.50x = 610,689,689.89
  5. Step 5: Solve for x
    x = 610,689,689.89/28,243.50
  6. Step 6: Final answer
    x = 21,622.31

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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.