Home / 7,128.32-9,836.80-3,984.48

Finding the Fourth Proportional to 7,128.32, 9,836.80 and 3,984.48

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Solution

The fourth proportional to 7,128.32, 9,836.80 and 3,984.48 is: 5,498.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.32 : 9,836.80 = 3,984.48 : x
  2. Step 2: Convert to fraction form
    7,128.32/9,836.80 = 3,984.48/x
  3. Step 3: Cross multiply
    7,128.32x = 9,836.80 × 3,984.48
  4. Step 4: Simplify right side
    7,128.32x = 39,194,532.86
  5. Step 5: Solve for x
    x = 39,194,532.86/7,128.32
  6. Step 6: Final answer
    x = 5,498.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.