Home / 19,218.64-28,825.56-5,179.78

Finding the Fourth Proportional to 19,218.64, 28,825.56 and 5,179.78

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Solution

The fourth proportional to 19,218.64, 28,825.56 and 5,179.78 is: 7,769.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,218.64 : 28,825.56 = 5,179.78 : x
  2. Step 2: Convert to fraction form
    19,218.64/28,825.56 = 5,179.78/x
  3. Step 3: Cross multiply
    19,218.64x = 28,825.56 × 5,179.78
  4. Step 4: Simplify right side
    19,218.64x = 149,310,059.18
  5. Step 5: Solve for x
    x = 149,310,059.18/19,218.64
  6. Step 6: Final answer
    x = 7,769.02

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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.