Home / 21,187.32-31,781.21-6,396.36

Finding the Fourth Proportional to 21,187.32, 31,781.21 and 6,396.36

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Solution

The fourth proportional to 21,187.32, 31,781.21 and 6,396.36 is: 9,594.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.32 : 31,781.21 = 6,396.36 : x
  2. Step 2: Convert to fraction form
    21,187.32/31,781.21 = 6,396.36/x
  3. Step 3: Cross multiply
    21,187.32x = 31,781.21 × 6,396.36
  4. Step 4: Simplify right side
    21,187.32x = 203,284,060.40
  5. Step 5: Solve for x
    x = 203,284,060.40/21,187.32
  6. Step 6: Final answer
    x = 9,594.61

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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.