Home / 18,977.94-28,443.60-13,432.86

Finding the Fourth Proportional to 18,977.94, 28,443.60 and 13,432.86

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Solution

The fourth proportional to 18,977.94, 28,443.60 and 13,432.86 is: 20,132.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,977.94 : 28,443.60 = 13,432.86 : x
  2. Step 2: Convert to fraction form
    18,977.94/28,443.60 = 13,432.86/x
  3. Step 3: Cross multiply
    18,977.94x = 28,443.60 × 13,432.86
  4. Step 4: Simplify right side
    18,977.94x = 382,078,896.70
  5. Step 5: Solve for x
    x = 382,078,896.70/18,977.94
  6. Step 6: Final answer
    x = 20,132.79

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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.