Home / 18,911.20-28,366.80-5,763.55

Finding the Fourth Proportional to 18,911.20, 28,366.80 and 5,763.55

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Solution

The fourth proportional to 18,911.20, 28,366.80 and 5,763.55 is: 8,645.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.20 : 28,366.80 = 5,763.55 : x
  2. Step 2: Convert to fraction form
    18,911.20/28,366.80 = 5,763.55/x
  3. Step 3: Cross multiply
    18,911.20x = 28,366.80 × 5,763.55
  4. Step 4: Simplify right side
    18,911.20x = 163,493,470.14
  5. Step 5: Solve for x
    x = 163,493,470.14/18,911.20
  6. Step 6: Final answer
    x = 8,645.33

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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.