Home / 19,977.96-29,951.76-12,078.78

Finding the Fourth Proportional to 19,977.96, 29,951.76 and 12,078.78

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Solution

The fourth proportional to 19,977.96, 29,951.76 and 12,078.78 is: 18,108.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,977.96 : 29,951.76 = 12,078.78 : x
  2. Step 2: Convert to fraction form
    19,977.96/29,951.76 = 12,078.78/x
  3. Step 3: Cross multiply
    19,977.96x = 29,951.76 × 12,078.78
  4. Step 4: Simplify right side
    19,977.96x = 361,780,719.65
  5. Step 5: Solve for x
    x = 361,780,719.65/19,977.96
  6. Step 6: Final answer
    x = 18,108.99

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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.