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Finding the Fourth Proportional to 23,249.60, 34,809.60 and 20,916.80

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Solution

The fourth proportional to 23,249.60, 34,809.60 and 20,916.80 is: 31,316.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,249.60 : 34,809.60 = 20,916.80 : x
  2. Step 2: Convert to fraction form
    23,249.60/34,809.60 = 20,916.80/x
  3. Step 3: Cross multiply
    23,249.60x = 34,809.60 × 20,916.80
  4. Step 4: Simplify right side
    23,249.60x = 728,105,441.28
  5. Step 5: Solve for x
    x = 728,105,441.28/23,249.60
  6. Step 6: Final answer
    x = 31,316.90

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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.