Home / 20,634.56-30,928.80-18,973.88

Finding the Fourth Proportional to 20,634.56, 30,928.80 and 18,973.88

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Solution

The fourth proportional to 20,634.56, 30,928.80 and 18,973.88 is: 28,439.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,634.56 : 30,928.80 = 18,973.88 : x
  2. Step 2: Convert to fraction form
    20,634.56/30,928.80 = 18,973.88/x
  3. Step 3: Cross multiply
    20,634.56x = 30,928.80 × 18,973.88
  4. Step 4: Simplify right side
    20,634.56x = 586,839,339.74
  5. Step 5: Solve for x
    x = 586,839,339.74/20,634.56
  6. Step 6: Final answer
    x = 28,439.63

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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.