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Finding the Fourth Proportional to 8,515.60, 12,774.80 and 2,670.80

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Solution

The fourth proportional to 8,515.60, 12,774.80 and 2,670.80 is: 4,006.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.60 : 12,774.80 = 2,670.80 : x
  2. Step 2: Convert to fraction form
    8,515.60/12,774.80 = 2,670.80/x
  3. Step 3: Cross multiply
    8,515.60x = 12,774.80 × 2,670.80
  4. Step 4: Simplify right side
    8,515.60x = 34,118,935.84
  5. Step 5: Solve for x
    x = 34,118,935.84/8,515.60
  6. Step 6: Final answer
    x = 4,006.64

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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.