Home / 18,679.20-28,007.31-9,179.43

Finding the Fourth Proportional to 18,679.20, 28,007.31 and 9,179.43

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Solution

The fourth proportional to 18,679.20, 28,007.31 and 9,179.43 is: 13,763.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.20 : 28,007.31 = 9,179.43 : x
  2. Step 2: Convert to fraction form
    18,679.20/28,007.31 = 9,179.43/x
  3. Step 3: Cross multiply
    18,679.20x = 28,007.31 × 9,179.43
  4. Step 4: Simplify right side
    18,679.20x = 257,091,141.63
  5. Step 5: Solve for x
    x = 257,091,141.63/18,679.20
  6. Step 6: Final answer
    x = 13,763.50

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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.