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Finding the Fourth Proportional to 52,293.57, 78,415.84 and 18,990.42

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Solution

The fourth proportional to 52,293.57, 78,415.84 and 18,990.42 is: 28,476.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,293.57 : 78,415.84 = 18,990.42 : x
  2. Step 2: Convert to fraction form
    52,293.57/78,415.84 = 18,990.42/x
  3. Step 3: Cross multiply
    52,293.57x = 78,415.84 × 18,990.42
  4. Step 4: Simplify right side
    52,293.57x = 1,489,149,736.25
  5. Step 5: Solve for x
    x = 1,489,149,736.25/52,293.57
  6. Step 6: Final answer
    x = 28,476.73

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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.