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Finding the Fourth Proportional to 38,958.58, 58,400.87 and 12,644.92

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Solution

The fourth proportional to 38,958.58, 58,400.87 and 12,644.92 is: 18,955.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,958.58 : 58,400.87 = 12,644.92 : x
  2. Step 2: Convert to fraction form
    38,958.58/58,400.87 = 12,644.92/x
  3. Step 3: Cross multiply
    38,958.58x = 58,400.87 × 12,644.92
  4. Step 4: Simplify right side
    38,958.58x = 738,474,329.08
  5. Step 5: Solve for x
    x = 738,474,329.08/38,958.58
  6. Step 6: Final answer
    x = 18,955.37

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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.