Home / 8,128.93-12,195.09-4,620.56

Finding the Fourth Proportional to 8,128.93, 12,195.09 and 4,620.56

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Solution

The fourth proportional to 8,128.93, 12,195.09 and 4,620.56 is: 6,931.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.93 : 12,195.09 = 4,620.56 : x
  2. Step 2: Convert to fraction form
    8,128.93/12,195.09 = 4,620.56/x
  3. Step 3: Cross multiply
    8,128.93x = 12,195.09 × 4,620.56
  4. Step 4: Simplify right side
    8,128.93x = 56,348,145.05
  5. Step 5: Solve for x
    x = 56,348,145.05/8,128.93
  6. Step 6: Final answer
    x = 6,931.80

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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.