Home / 21,228.38-31,847.16-6,438.43

Finding the Fourth Proportional to 21,228.38, 31,847.16 and 6,438.43

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Solution

The fourth proportional to 21,228.38, 31,847.16 and 6,438.43 is: 9,659.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.38 : 31,847.16 = 6,438.43 : x
  2. Step 2: Convert to fraction form
    21,228.38/31,847.16 = 6,438.43/x
  3. Step 3: Cross multiply
    21,228.38x = 31,847.16 × 6,438.43
  4. Step 4: Simplify right side
    21,228.38x = 205,045,551.12
  5. Step 5: Solve for x
    x = 205,045,551.12/21,228.38
  6. Step 6: Final answer
    x = 9,659.03

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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.