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Finding the Fourth Proportional to 47,910.83, 71,866.51 and 12,369.72

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Solution

The fourth proportional to 47,910.83, 71,866.51 and 12,369.72 is: 18,554.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,910.83 : 71,866.51 = 12,369.72 : x
  2. Step 2: Convert to fraction form
    47,910.83/71,866.51 = 12,369.72/x
  3. Step 3: Cross multiply
    47,910.83x = 71,866.51 × 12,369.72
  4. Step 4: Simplify right side
    47,910.83x = 888,968,246.74
  5. Step 5: Solve for x
    x = 888,968,246.74/47,910.83
  6. Step 6: Final answer
    x = 18,554.64

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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.