Home / 9,890.20-14,835.30-8,219.80

Finding the Fourth Proportional to 9,890.20, 14,835.30 and 8,219.80

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Solution

The fourth proportional to 9,890.20, 14,835.30 and 8,219.80 is: 12,329.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,890.20 : 14,835.30 = 8,219.80 : x
  2. Step 2: Convert to fraction form
    9,890.20/14,835.30 = 8,219.80/x
  3. Step 3: Cross multiply
    9,890.20x = 14,835.30 × 8,219.80
  4. Step 4: Simplify right side
    9,890.20x = 121,943,198.94
  5. Step 5: Solve for x
    x = 121,943,198.94/9,890.20
  6. Step 6: Final answer
    x = 12,329.70

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Similar ratio
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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.