Home / 21,230.25-31,845.45-6,439.30

Finding the Fourth Proportional to 21,230.25, 31,845.45 and 6,439.30

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Solution

The fourth proportional to 21,230.25, 31,845.45 and 6,439.30 is: 9,658.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.25 : 31,845.45 = 6,439.30 : x
  2. Step 2: Convert to fraction form
    21,230.25/31,845.45 = 6,439.30/x
  3. Step 3: Cross multiply
    21,230.25x = 31,845.45 × 6,439.30
  4. Step 4: Simplify right side
    21,230.25x = 205,062,350.72
  5. Step 5: Solve for x
    x = 205,062,350.72/21,230.25
  6. Step 6: Final answer
    x = 9,658.97

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1.5x scale

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.