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Finding the Fourth Proportional to 64,893.60, 97,339.80 and 20,520.38

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Solution

The fourth proportional to 64,893.60, 97,339.80 and 20,520.38 is: 30,780.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,893.60 : 97,339.80 = 20,520.38 : x
  2. Step 2: Convert to fraction form
    64,893.60/97,339.80 = 20,520.38/x
  3. Step 3: Cross multiply
    64,893.60x = 97,339.80 × 20,520.38
  4. Step 4: Simplify right side
    64,893.60x = 1,997,449,198.43
  5. Step 5: Solve for x
    x = 1,997,449,198.43/64,893.60
  6. Step 6: Final answer
    x = 30,780.37

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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.