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Finding the Fourth Proportional to 8,380.53, 12,570.76 and 3,186.41

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Solution

The fourth proportional to 8,380.53, 12,570.76 and 3,186.41 is: 4,779.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,380.53 : 12,570.76 = 3,186.41 : x
  2. Step 2: Convert to fraction form
    8,380.53/12,570.76 = 3,186.41/x
  3. Step 3: Cross multiply
    8,380.53x = 12,570.76 × 3,186.41
  4. Step 4: Simplify right side
    8,380.53x = 40,055,595.37
  5. Step 5: Solve for x
    x = 40,055,595.37/8,380.53
  6. Step 6: Final answer
    x = 4,779.60

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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.