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Finding the Fourth Proportional to 45,894.78, 68,828.94 and 12,615.96

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Solution

The fourth proportional to 45,894.78, 68,828.94 and 12,615.96 is: 18,920.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,894.78 : 68,828.94 = 12,615.96 : x
  2. Step 2: Convert to fraction form
    45,894.78/68,828.94 = 12,615.96/x
  3. Step 3: Cross multiply
    45,894.78x = 68,828.94 × 12,615.96
  4. Step 4: Simplify right side
    45,894.78x = 868,343,153.88
  5. Step 5: Solve for x
    x = 868,343,153.88/45,894.78
  6. Step 6: Final answer
    x = 18,920.30

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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.