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Finding the Fourth Proportional to 7,767.96, 10,645.08 and 7,020.60

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Solution

The fourth proportional to 7,767.96, 10,645.08 and 7,020.60 is: 9,620.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,767.96 : 10,645.08 = 7,020.60 : x
  2. Step 2: Convert to fraction form
    7,767.96/10,645.08 = 7,020.60/x
  3. Step 3: Cross multiply
    7,767.96x = 10,645.08 × 7,020.60
  4. Step 4: Simplify right side
    7,767.96x = 74,734,821.89
  5. Step 5: Solve for x
    x = 74,734,821.89/7,767.96
  6. Step 6: Final answer
    x = 9,620.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.