Home / 10,986.40-16,479.60-8,912.80

Finding the Fourth Proportional to 10,986.40, 16,479.60 and 8,912.80

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Solution

The fourth proportional to 10,986.40, 16,479.60 and 8,912.80 is: 13,369.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,986.40 : 16,479.60 = 8,912.80 : x
  2. Step 2: Convert to fraction form
    10,986.40/16,479.60 = 8,912.80/x
  3. Step 3: Cross multiply
    10,986.40x = 16,479.60 × 8,912.80
  4. Step 4: Simplify right side
    10,986.40x = 146,879,378.88
  5. Step 5: Solve for x
    x = 146,879,378.88/10,986.40
  6. Step 6: Final answer
    x = 13,369.20

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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.