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Finding the Fourth Proportional to 12,434.50, 18,653.91 and 6,278.50

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Solution

The fourth proportional to 12,434.50, 18,653.91 and 6,278.50 is: 9,418.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,434.50 : 18,653.91 = 6,278.50 : x
  2. Step 2: Convert to fraction form
    12,434.50/18,653.91 = 6,278.50/x
  3. Step 3: Cross multiply
    12,434.50x = 18,653.91 × 6,278.50
  4. Step 4: Simplify right side
    12,434.50x = 117,118,573.94
  5. Step 5: Solve for x
    x = 117,118,573.94/12,434.50
  6. Step 6: Final answer
    x = 9,418.84

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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.