Home / 28,911.20-43,366.80-9,191.30

Finding the Fourth Proportional to 28,911.20, 43,366.80 and 9,191.30

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Solution

The fourth proportional to 28,911.20, 43,366.80 and 9,191.30 is: 13,786.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,911.20 : 43,366.80 = 9,191.30 : x
  2. Step 2: Convert to fraction form
    28,911.20/43,366.80 = 9,191.30/x
  3. Step 3: Cross multiply
    28,911.20x = 43,366.80 × 9,191.30
  4. Step 4: Simplify right side
    28,911.20x = 398,597,268.84
  5. Step 5: Solve for x
    x = 398,597,268.84/28,911.20
  6. Step 6: Final answer
    x = 13,786.95

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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.