Home / 11,816.20-17,730.70-4,891.40

Finding the Fourth Proportional to 11,816.20, 17,730.70 and 4,891.40

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Solution

The fourth proportional to 11,816.20, 17,730.70 and 4,891.40 is: 7,339.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,816.20 : 17,730.70 = 4,891.40 : x
  2. Step 2: Convert to fraction form
    11,816.20/17,730.70 = 4,891.40/x
  3. Step 3: Cross multiply
    11,816.20x = 17,730.70 × 4,891.40
  4. Step 4: Simplify right side
    11,816.20x = 86,727,945.98
  5. Step 5: Solve for x
    x = 86,727,945.98/11,816.20
  6. Step 6: Final answer
    x = 7,339.75

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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.