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Finding the Fourth Proportional to 20,616.88, 30,928.43 and 7,472.34

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Solution

The fourth proportional to 20,616.88, 30,928.43 and 7,472.34 is: 11,209.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616.88 : 30,928.43 = 7,472.34 : x
  2. Step 2: Convert to fraction form
    20,616.88/30,928.43 = 7,472.34/x
  3. Step 3: Cross multiply
    20,616.88x = 30,928.43 × 7,472.34
  4. Step 4: Simplify right side
    20,616.88x = 231,107,744.63
  5. Step 5: Solve for x
    x = 231,107,744.63/20,616.88
  6. Step 6: Final answer
    x = 11,209.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.