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Finding the Fourth Proportional to 8,482.65, 12,728.49 and 6,388.26

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Solution

The fourth proportional to 8,482.65, 12,728.49 and 6,388.26 is: 9,585.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,482.65 : 12,728.49 = 6,388.26 : x
  2. Step 2: Convert to fraction form
    8,482.65/12,728.49 = 6,388.26/x
  3. Step 3: Cross multiply
    8,482.65x = 12,728.49 × 6,388.26
  4. Step 4: Simplify right side
    8,482.65x = 81,312,903.53
  5. Step 5: Solve for x
    x = 81,312,903.53/8,482.65
  6. Step 6: Final answer
    x = 9,585.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.