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Finding the Fourth Proportional to 12,645.98, 18,954.18 and 9,515.94

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Solution

The fourth proportional to 12,645.98, 18,954.18 and 9,515.94 is: 14,262.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.98 : 18,954.18 = 9,515.94 : x
  2. Step 2: Convert to fraction form
    12,645.98/18,954.18 = 9,515.94/x
  3. Step 3: Cross multiply
    12,645.98x = 18,954.18 × 9,515.94
  4. Step 4: Simplify right side
    12,645.98x = 180,366,839.63
  5. Step 5: Solve for x
    x = 180,366,839.63/12,645.98
  6. Step 6: Final answer
    x = 14,262.78

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1.5x scale

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.