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Finding the Fourth Proportional to 7,819.56, 11,728.78 and 2,888.28

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Solution

The fourth proportional to 7,819.56, 11,728.78 and 2,888.28 is: 4,332.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,819.56 : 11,728.78 = 2,888.28 : x
  2. Step 2: Convert to fraction form
    7,819.56/11,728.78 = 2,888.28/x
  3. Step 3: Cross multiply
    7,819.56x = 11,728.78 × 2,888.28
  4. Step 4: Simplify right side
    7,819.56x = 33,876,000.70
  5. Step 5: Solve for x
    x = 33,876,000.70/7,819.56
  6. Step 6: Final answer
    x = 4,332.21

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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.