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Finding the Fourth Proportional to 12,363, 18,544.60 and 3,129

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Solution

The fourth proportional to 12,363, 18,544.60 and 3,129 is: 4,693.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,363 : 18,544.60 = 3,129 : x
  2. Step 2: Convert to fraction form
    12,363/18,544.60 = 3,129/x
  3. Step 3: Cross multiply
    12,363x = 18,544.60 × 3,129
  4. Step 4: Simplify right side
    12,363x = 58,026,053.40
  5. Step 5: Solve for x
    x = 58,026,053.40/12,363
  6. Step 6: Final answer
    x = 4,693.53

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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.