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Finding the Fourth Proportional to 7,800.76, 10,765.07 and 4,815.91

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Solution

The fourth proportional to 7,800.76, 10,765.07 and 4,815.91 is: 6,645.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,800.76 : 10,765.07 = 4,815.91 : x
  2. Step 2: Convert to fraction form
    7,800.76/10,765.07 = 4,815.91/x
  3. Step 3: Cross multiply
    7,800.76x = 10,765.07 × 4,815.91
  4. Step 4: Simplify right side
    7,800.76x = 51,843,608.26
  5. Step 5: Solve for x
    x = 51,843,608.26/7,800.76
  6. Step 6: Final answer
    x = 6,645.97

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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.