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Finding the Fourth Proportional to 18,443.60, 25,447.56 and 16,830.80

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Solution

The fourth proportional to 18,443.60, 25,447.56 and 16,830.80 is: 23,222.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,443.60 : 25,447.56 = 16,830.80 : x
  2. Step 2: Convert to fraction form
    18,443.60/25,447.56 = 16,830.80/x
  3. Step 3: Cross multiply
    18,443.60x = 25,447.56 × 16,830.80
  4. Step 4: Simplify right side
    18,443.60x = 428,302,792.85
  5. Step 5: Solve for x
    x = 428,302,792.85/18,443.60
  6. Step 6: Final answer
    x = 23,222.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.