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Finding the Fourth Proportional to 7,819.84, 10,791.40 and 4,283.28

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Solution

The fourth proportional to 7,819.84, 10,791.40 and 4,283.28 is: 5,910.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,819.84 : 10,791.40 = 4,283.28 : x
  2. Step 2: Convert to fraction form
    7,819.84/10,791.40 = 4,283.28/x
  3. Step 3: Cross multiply
    7,819.84x = 10,791.40 × 4,283.28
  4. Step 4: Simplify right side
    7,819.84x = 46,222,587.79
  5. Step 5: Solve for x
    x = 46,222,587.79/7,819.84
  6. Step 6: Final answer
    x = 5,910.94

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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.