Home / 19,179.20-28,731.90-13,830.74

Finding the Fourth Proportional to 19,179.20, 28,731.90 and 13,830.74

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Solution

The fourth proportional to 19,179.20, 28,731.90 and 13,830.74 is: 20,719.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,179.20 : 28,731.90 = 13,830.74 : x
  2. Step 2: Convert to fraction form
    19,179.20/28,731.90 = 13,830.74/x
  3. Step 3: Cross multiply
    19,179.20x = 28,731.90 × 13,830.74
  4. Step 4: Simplify right side
    19,179.20x = 397,383,438.61
  5. Step 5: Solve for x
    x = 397,383,438.61/19,179.20
  6. Step 6: Final answer
    x = 20,719.50

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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.