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Finding the Fourth Proportional to 7,819.60, 10,790.94 and 4,282.60

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Solution

The fourth proportional to 7,819.60, 10,790.94 and 4,282.60 is: 5,909.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,819.60 : 10,790.94 = 4,282.60 : x
  2. Step 2: Convert to fraction form
    7,819.60/10,790.94 = 4,282.60/x
  3. Step 3: Cross multiply
    7,819.60x = 10,790.94 × 4,282.60
  4. Step 4: Simplify right side
    7,819.60x = 46,213,279.64
  5. Step 5: Solve for x
    x = 46,213,279.64/7,819.60
  6. Step 6: Final answer
    x = 5,909.93

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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.