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Finding the Fourth Proportional to 51,418.70, 70,957.31 and 28,757.42

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Solution

The fourth proportional to 51,418.70, 70,957.31 and 28,757.42 is: 39,684.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,418.70 : 70,957.31 = 28,757.42 : x
  2. Step 2: Convert to fraction form
    51,418.70/70,957.31 = 28,757.42/x
  3. Step 3: Cross multiply
    51,418.70x = 70,957.31 × 28,757.42
  4. Step 4: Simplify right side
    51,418.70x = 2,040,548,667.17
  5. Step 5: Solve for x
    x = 2,040,548,667.17/51,418.70
  6. Step 6: Final answer
    x = 39,684.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.