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Finding the Fourth Proportional to 28,747.38, 43,121.07 and 7,970.88

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Solution

The fourth proportional to 28,747.38, 43,121.07 and 7,970.88 is: 11,956.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,747.38 : 43,121.07 = 7,970.88 : x
  2. Step 2: Convert to fraction form
    28,747.38/43,121.07 = 7,970.88/x
  3. Step 3: Cross multiply
    28,747.38x = 43,121.07 × 7,970.88
  4. Step 4: Simplify right side
    28,747.38x = 343,712,874.44
  5. Step 5: Solve for x
    x = 343,712,874.44/28,747.38
  6. Step 6: Final answer
    x = 11,956.32

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Similar ratio
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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.