Home / 13,195.86-18,211.66-7,821.50

Finding the Fourth Proportional to 13,195.86, 18,211.66 and 7,821.50

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Solution

The fourth proportional to 13,195.86, 18,211.66 and 7,821.50 is: 10,794.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,195.86 : 18,211.66 = 7,821.50 : x
  2. Step 2: Convert to fraction form
    13,195.86/18,211.66 = 7,821.50/x
  3. Step 3: Cross multiply
    13,195.86x = 18,211.66 × 7,821.50
  4. Step 4: Simplify right side
    13,195.86x = 142,442,498.69
  5. Step 5: Solve for x
    x = 142,442,498.69/13,195.86
  6. Step 6: Final answer
    x = 10,794.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.