Home / 8,128.13-12,191.59-2,934.01

Finding the Fourth Proportional to 8,128.13, 12,191.59 and 2,934.01

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Solution

The fourth proportional to 8,128.13, 12,191.59 and 2,934.01 is: 4,400.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.13 : 12,191.59 = 2,934.01 : x
  2. Step 2: Convert to fraction form
    8,128.13/12,191.59 = 2,934.01/x
  3. Step 3: Cross multiply
    8,128.13x = 12,191.59 × 2,934.01
  4. Step 4: Simplify right side
    8,128.13x = 35,770,246.98
  5. Step 5: Solve for x
    x = 35,770,246.98/8,128.13
  6. Step 6: Final answer
    x = 4,400.80

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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.