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Finding the Fourth Proportional to 45,918.54, 68,868.68 and 12,630

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Solution

The fourth proportional to 45,918.54, 68,868.68 and 12,630 is: 18,942.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,918.54 : 68,868.68 = 12,630 : x
  2. Step 2: Convert to fraction form
    45,918.54/68,868.68 = 12,630/x
  3. Step 3: Cross multiply
    45,918.54x = 68,868.68 × 12,630
  4. Step 4: Simplify right side
    45,918.54x = 869,811,428.40
  5. Step 5: Solve for x
    x = 869,811,428.40/45,918.54
  6. Step 6: Final answer
    x = 18,942.49

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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.