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Finding the Fourth Proportional to 6,390.75, 8,819.24 and 5,267.55

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Solution

The fourth proportional to 6,390.75, 8,819.24 and 5,267.55 is: 7,269.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.75 : 8,819.24 = 5,267.55 : x
  2. Step 2: Convert to fraction form
    6,390.75/8,819.24 = 5,267.55/x
  3. Step 3: Cross multiply
    6,390.75x = 8,819.24 × 5,267.55
  4. Step 4: Simplify right side
    6,390.75x = 46,455,761.32
  5. Step 5: Solve for x
    x = 46,455,761.32/6,390.75
  6. Step 6: Final answer
    x = 7,269.22

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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.