Home / 8,091.20-12,136.80-5,499.20

Finding the Fourth Proportional to 8,091.20, 12,136.80 and 5,499.20

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Solution

The fourth proportional to 8,091.20, 12,136.80 and 5,499.20 is: 8,248.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,091.20 : 12,136.80 = 5,499.20 : x
  2. Step 2: Convert to fraction form
    8,091.20/12,136.80 = 5,499.20/x
  3. Step 3: Cross multiply
    8,091.20x = 12,136.80 × 5,499.20
  4. Step 4: Simplify right side
    8,091.20x = 66,742,690.56
  5. Step 5: Solve for x
    x = 66,742,690.56/8,091.20
  6. Step 6: Final answer
    x = 8,248.80

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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.