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Finding the Fourth Proportional to 12,453.74, 18,634.48 and 9,981.06

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Solution

The fourth proportional to 12,453.74, 18,634.48 and 9,981.06 is: 14,934.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,453.74 : 18,634.48 = 9,981.06 : x
  2. Step 2: Convert to fraction form
    12,453.74/18,634.48 = 9,981.06/x
  3. Step 3: Cross multiply
    12,453.74x = 18,634.48 × 9,981.06
  4. Step 4: Simplify right side
    12,453.74x = 185,991,862.95
  5. Step 5: Solve for x
    x = 185,991,862.95/12,453.74
  6. Step 6: Final answer
    x = 14,934.62

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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.