Home / 21,231.72-31,847.70-6,440.66

Finding the Fourth Proportional to 21,231.72, 31,847.70 and 6,440.66

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Solution

The fourth proportional to 21,231.72, 31,847.70 and 6,440.66 is: 9,661.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.72 : 31,847.70 = 6,440.66 : x
  2. Step 2: Convert to fraction form
    21,231.72/31,847.70 = 6,440.66/x
  3. Step 3: Cross multiply
    21,231.72x = 31,847.70 × 6,440.66
  4. Step 4: Simplify right side
    21,231.72x = 205,120,207.48
  5. Step 5: Solve for x
    x = 205,120,207.48/21,231.72
  6. Step 6: Final answer
    x = 9,661.03

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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.