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Finding the Fourth Proportional to 42,651.44, 63,984.72 and 20,504.96

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Solution

The fourth proportional to 42,651.44, 63,984.72 and 20,504.96 is: 30,761.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,651.44 : 63,984.72 = 20,504.96 : x
  2. Step 2: Convert to fraction form
    42,651.44/63,984.72 = 20,504.96/x
  3. Step 3: Cross multiply
    42,651.44x = 63,984.72 × 20,504.96
  4. Step 4: Simplify right side
    42,651.44x = 1,312,004,124.21
  5. Step 5: Solve for x
    x = 1,312,004,124.21/42,651.44
  6. Step 6: Final answer
    x = 30,761.07

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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.