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Finding the Fourth Proportional to 53,991.98, 80,988.51 and 18,932.48

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Solution

The fourth proportional to 53,991.98, 80,988.51 and 18,932.48 is: 28,398.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,991.98 : 80,988.51 = 18,932.48 : x
  2. Step 2: Convert to fraction form
    53,991.98/80,988.51 = 18,932.48/x
  3. Step 3: Cross multiply
    53,991.98x = 80,988.51 × 18,932.48
  4. Step 4: Simplify right side
    53,991.98x = 1,533,313,345.80
  5. Step 5: Solve for x
    x = 1,533,313,345.80/53,991.98
  6. Step 6: Final answer
    x = 28,398.91

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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.