Home / 51,991.06-78,015.75-20,828.74

Finding the Fourth Proportional to 51,991.06, 78,015.75 and 20,828.74

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Solution

The fourth proportional to 51,991.06, 78,015.75 and 20,828.74 is: 31,254.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,991.06 : 78,015.75 = 20,828.74 : x
  2. Step 2: Convert to fraction form
    51,991.06/78,015.75 = 20,828.74/x
  3. Step 3: Cross multiply
    51,991.06x = 78,015.75 × 20,828.74
  4. Step 4: Simplify right side
    51,991.06x = 1,624,969,772.66
  5. Step 5: Solve for x
    x = 1,624,969,772.66/51,991.06
  6. Step 6: Final answer
    x = 31,254.79

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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.