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Finding the Fourth Proportional to 8,308.78, 12,460.70 and 3,113.44

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Solution

The fourth proportional to 8,308.78, 12,460.70 and 3,113.44 is: 4,669.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,308.78 : 12,460.70 = 3,113.44 : x
  2. Step 2: Convert to fraction form
    8,308.78/12,460.70 = 3,113.44/x
  3. Step 3: Cross multiply
    8,308.78x = 12,460.70 × 3,113.44
  4. Step 4: Simplify right side
    8,308.78x = 38,795,641.81
  5. Step 5: Solve for x
    x = 38,795,641.81/8,308.78
  6. Step 6: Final answer
    x = 4,669.23

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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.