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Finding the Fourth Proportional to 18,706.80, 28,049.76 and 9,327.72

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Solution

The fourth proportional to 18,706.80, 28,049.76 and 9,327.72 is: 13,986.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.80 : 28,049.76 = 9,327.72 : x
  2. Step 2: Convert to fraction form
    18,706.80/28,049.76 = 9,327.72/x
  3. Step 3: Cross multiply
    18,706.80x = 28,049.76 × 9,327.72
  4. Step 4: Simplify right side
    18,706.80x = 261,640,307.35
  5. Step 5: Solve for x
    x = 261,640,307.35/18,706.80
  6. Step 6: Final answer
    x = 13,986.37

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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.