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Finding the Fourth Proportional to 13,551, 20,329.80 and 4,317

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Solution

The fourth proportional to 13,551, 20,329.80 and 4,317 is: 6,476.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,551 : 20,329.80 = 4,317 : x
  2. Step 2: Convert to fraction form
    13,551/20,329.80 = 4,317/x
  3. Step 3: Cross multiply
    13,551x = 20,329.80 × 4,317
  4. Step 4: Simplify right side
    13,551x = 87,763,746.60
  5. Step 5: Solve for x
    x = 87,763,746.60/13,551
  6. Step 6: Final answer
    x = 6,476.55

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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.