Home / 21,228.87-31,844.94-6,439.02

Finding the Fourth Proportional to 21,228.87, 31,844.94 and 6,439.02

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Solution

The fourth proportional to 21,228.87, 31,844.94 and 6,439.02 is: 9,659.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.87 : 31,844.94 = 6,439.02 : x
  2. Step 2: Convert to fraction form
    21,228.87/31,844.94 = 6,439.02/x
  3. Step 3: Cross multiply
    21,228.87x = 31,844.94 × 6,439.02
  4. Step 4: Simplify right side
    21,228.87x = 205,050,205.56
  5. Step 5: Solve for x
    x = 205,050,205.56/21,228.87
  6. Step 6: Final answer
    x = 9,659.03

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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.