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Finding the Fourth Proportional to 8,328.51, 12,478.75 and 3,881.39

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Solution

The fourth proportional to 8,328.51, 12,478.75 and 3,881.39 is: 5,815.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,328.51 : 12,478.75 = 3,881.39 : x
  2. Step 2: Convert to fraction form
    8,328.51/12,478.75 = 3,881.39/x
  3. Step 3: Cross multiply
    8,328.51x = 12,478.75 × 3,881.39
  4. Step 4: Simplify right side
    8,328.51x = 48,434,833.07
  5. Step 5: Solve for x
    x = 48,434,833.07/8,328.51
  6. Step 6: Final answer
    x = 5,815.55

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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.