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Finding the Fourth Proportional to 18,552.60, 27,828.90 and 12,647.70

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Solution

The fourth proportional to 18,552.60, 27,828.90 and 12,647.70 is: 18,971.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,552.60 : 27,828.90 = 12,647.70 : x
  2. Step 2: Convert to fraction form
    18,552.60/27,828.90 = 12,647.70/x
  3. Step 3: Cross multiply
    18,552.60x = 27,828.90 × 12,647.70
  4. Step 4: Simplify right side
    18,552.60x = 351,971,578.53
  5. Step 5: Solve for x
    x = 351,971,578.53/18,552.60
  6. Step 6: Final answer
    x = 18,971.55

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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.