Home / 8,279.30-12,431.09-5,172.54

Finding the Fourth Proportional to 8,279.30, 12,431.09 and 5,172.54

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Solution

The fourth proportional to 8,279.30, 12,431.09 and 5,172.54 is: 7,766.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.30 : 12,431.09 = 5,172.54 : x
  2. Step 2: Convert to fraction form
    8,279.30/12,431.09 = 5,172.54/x
  3. Step 3: Cross multiply
    8,279.30x = 12,431.09 × 5,172.54
  4. Step 4: Simplify right side
    8,279.30x = 64,300,323.20
  5. Step 5: Solve for x
    x = 64,300,323.20/8,279.30
  6. Step 6: Final answer
    x = 7,766.40

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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.