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Finding the Fourth Proportional to 55,927.80, 83,893.62 and 18,987

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Solution

The fourth proportional to 55,927.80, 83,893.62 and 18,987 is: 28,481.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,927.80 : 83,893.62 = 18,987 : x
  2. Step 2: Convert to fraction form
    55,927.80/83,893.62 = 18,987/x
  3. Step 3: Cross multiply
    55,927.80x = 83,893.62 × 18,987
  4. Step 4: Simplify right side
    55,927.80x = 1,592,888,162.94
  5. Step 5: Solve for x
    x = 1,592,888,162.94/55,927.80
  6. Step 6: Final answer
    x = 28,481.15

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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.