Home / 53,980.32-81,016.56-21,171.36

Finding the Fourth Proportional to 53,980.32, 81,016.56 and 21,171.36

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Solution

The fourth proportional to 53,980.32, 81,016.56 and 21,171.36 is: 31,775.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,980.32 : 81,016.56 = 21,171.36 : x
  2. Step 2: Convert to fraction form
    53,980.32/81,016.56 = 21,171.36/x
  3. Step 3: Cross multiply
    53,980.32x = 81,016.56 × 21,171.36
  4. Step 4: Simplify right side
    53,980.32x = 1,715,230,757.72
  5. Step 5: Solve for x
    x = 1,715,230,757.72/53,980.32
  6. Step 6: Final answer
    x = 31,775.11

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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.