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Finding the Fourth Proportional to 53,997.60, 80,938.80 and 20,704.80

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Solution

The fourth proportional to 53,997.60, 80,938.80 and 20,704.80 is: 31,035.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,997.60 : 80,938.80 = 20,704.80 : x
  2. Step 2: Convert to fraction form
    53,997.60/80,938.80 = 20,704.80/x
  3. Step 3: Cross multiply
    53,997.60x = 80,938.80 × 20,704.80
  4. Step 4: Simplify right side
    53,997.60x = 1,675,821,666.24
  5. Step 5: Solve for x
    x = 1,675,821,666.24/53,997.60
  6. Step 6: Final answer
    x = 31,035.11

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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.