Home / 53,982.14-81,009.35-18,921.78

Finding the Fourth Proportional to 53,982.14, 81,009.35 and 18,921.78

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Solution

The fourth proportional to 53,982.14, 81,009.35 and 18,921.78 is: 28,395.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,982.14 : 81,009.35 = 18,921.78 : x
  2. Step 2: Convert to fraction form
    53,982.14/81,009.35 = 18,921.78/x
  3. Step 3: Cross multiply
    53,982.14x = 81,009.35 × 18,921.78
  4. Step 4: Simplify right side
    53,982.14x = 1,532,841,004.03
  5. Step 5: Solve for x
    x = 1,532,841,004.03/53,982.14
  6. Step 6: Final answer
    x = 28,395.34

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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.