Home / 11,211.90-16,821.45-7,518.30

Finding the Fourth Proportional to 11,211.90, 16,821.45 and 7,518.30

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Solution

The fourth proportional to 11,211.90, 16,821.45 and 7,518.30 is: 11,279.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,211.90 : 16,821.45 = 7,518.30 : x
  2. Step 2: Convert to fraction form
    11,211.90/16,821.45 = 7,518.30/x
  3. Step 3: Cross multiply
    11,211.90x = 16,821.45 × 7,518.30
  4. Step 4: Simplify right side
    11,211.90x = 126,468,707.54
  5. Step 5: Solve for x
    x = 126,468,707.54/11,211.90
  6. Step 6: Final answer
    x = 11,279.86

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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.