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Finding the Fourth Proportional to 8,321.40, 12,484.40 and 5,360.85

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Solution

The fourth proportional to 8,321.40, 12,484.40 and 5,360.85 is: 8,042.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.40 : 12,484.40 = 5,360.85 : x
  2. Step 2: Convert to fraction form
    8,321.40/12,484.40 = 5,360.85/x
  3. Step 3: Cross multiply
    8,321.40x = 12,484.40 × 5,360.85
  4. Step 4: Simplify right side
    8,321.40x = 66,926,968.94
  5. Step 5: Solve for x
    x = 66,926,968.94/8,321.40
  6. Step 6: Final answer
    x = 8,042.75

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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.