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Finding the Fourth Proportional to 8,460.53, 12,691.21 and 2,220.56

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Solution

The fourth proportional to 8,460.53, 12,691.21 and 2,220.56 is: 3,330.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,460.53 : 12,691.21 = 2,220.56 : x
  2. Step 2: Convert to fraction form
    8,460.53/12,691.21 = 2,220.56/x
  3. Step 3: Cross multiply
    8,460.53x = 12,691.21 × 2,220.56
  4. Step 4: Simplify right side
    8,460.53x = 28,181,518.72
  5. Step 5: Solve for x
    x = 28,181,518.72/8,460.53
  6. Step 6: Final answer
    x = 3,330.94

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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.