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Finding the Fourth Proportional to 8,775.65, 13,172.59 and 5,085.09

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Solution

The fourth proportional to 8,775.65, 13,172.59 and 5,085.09 is: 7,632.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,775.65 : 13,172.59 = 5,085.09 : x
  2. Step 2: Convert to fraction form
    8,775.65/13,172.59 = 5,085.09/x
  3. Step 3: Cross multiply
    8,775.65x = 13,172.59 × 5,085.09
  4. Step 4: Simplify right side
    8,775.65x = 66,983,792.97
  5. Step 5: Solve for x
    x = 66,983,792.97/8,775.65
  6. Step 6: Final answer
    x = 7,632.91

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1.5x scale

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.