Home / 53,979.30-80,954.55-18,915.30

Finding the Fourth Proportional to 53,979.30, 80,954.55 and 18,915.30

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Solution

The fourth proportional to 53,979.30, 80,954.55 and 18,915.30 is: 28,367.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,979.30 : 80,954.55 = 18,915.30 : x
  2. Step 2: Convert to fraction form
    53,979.30/80,954.55 = 18,915.30/x
  3. Step 3: Cross multiply
    53,979.30x = 80,954.55 × 18,915.30
  4. Step 4: Simplify right side
    53,979.30x = 1,531,279,599.62
  5. Step 5: Solve for x
    x = 1,531,279,599.62/53,979.30
  6. Step 6: Final answer
    x = 28,367.90

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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.