Home / 53,987.30-80,921.55-18,908.90

Finding the Fourth Proportional to 53,987.30, 80,921.55 and 18,908.90

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Solution

The fourth proportional to 53,987.30, 80,921.55 and 18,908.90 is: 28,342.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,987.30 : 80,921.55 = 18,908.90 : x
  2. Step 2: Convert to fraction form
    53,987.30/80,921.55 = 18,908.90/x
  3. Step 3: Cross multiply
    53,987.30x = 80,921.55 × 18,908.90
  4. Step 4: Simplify right side
    53,987.30x = 1,530,137,496.80
  5. Step 5: Solve for x
    x = 1,530,137,496.80/53,987.30
  6. Step 6: Final answer
    x = 28,342.55

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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.