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Finding the Fourth Proportional to 7,321.65, 10,120.49 and 6,740.39

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Solution

The fourth proportional to 7,321.65, 10,120.49 and 6,740.39 is: 9,317.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.65 : 10,120.49 = 6,740.39 : x
  2. Step 2: Convert to fraction form
    7,321.65/10,120.49 = 6,740.39/x
  3. Step 3: Cross multiply
    7,321.65x = 10,120.49 × 6,740.39
  4. Step 4: Simplify right side
    7,321.65x = 68,215,965.29
  5. Step 5: Solve for x
    x = 68,215,965.29/7,321.65
  6. Step 6: Final answer
    x = 9,317.02

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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.