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Finding the Fourth Proportional to 8,515.08, 12,774.51 and 3,321

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Solution

The fourth proportional to 8,515.08, 12,774.51 and 3,321 is: 4,982.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.08 : 12,774.51 = 3,321 : x
  2. Step 2: Convert to fraction form
    8,515.08/12,774.51 = 3,321/x
  3. Step 3: Cross multiply
    8,515.08x = 12,774.51 × 3,321
  4. Step 4: Simplify right side
    8,515.08x = 42,424,147.71
  5. Step 5: Solve for x
    x = 42,424,147.71/8,515.08
  6. Step 6: Final answer
    x = 4,982.24

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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.