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Finding the Fourth Proportional to 12,551.76, 18,816.12 and 4,338

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Solution

The fourth proportional to 12,551.76, 18,816.12 and 4,338 is: 6,503.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,551.76 : 18,816.12 = 4,338 : x
  2. Step 2: Convert to fraction form
    12,551.76/18,816.12 = 4,338/x
  3. Step 3: Cross multiply
    12,551.76x = 18,816.12 × 4,338
  4. Step 4: Simplify right side
    12,551.76x = 81,624,328.56
  5. Step 5: Solve for x
    x = 81,624,328.56/12,551.76
  6. Step 6: Final answer
    x = 6,503.02

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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.