Home / 17,128.30-25,680.30-7,772.80

Finding the Fourth Proportional to 17,128.30, 25,680.30 and 7,772.80

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Solution

The fourth proportional to 17,128.30, 25,680.30 and 7,772.80 is: 11,653.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,128.30 : 25,680.30 = 7,772.80 : x
  2. Step 2: Convert to fraction form
    17,128.30/25,680.30 = 7,772.80/x
  3. Step 3: Cross multiply
    17,128.30x = 25,680.30 × 7,772.80
  4. Step 4: Simplify right side
    17,128.30x = 199,607,835.84
  5. Step 5: Solve for x
    x = 199,607,835.84/17,128.30
  6. Step 6: Final answer
    x = 11,653.69

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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.