Home / 21,235.58-31,867.71-8,087.61

Finding the Fourth Proportional to 21,235.58, 31,867.71 and 8,087.61

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Solution

The fourth proportional to 21,235.58, 31,867.71 and 8,087.61 is: 12,136.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,235.58 : 31,867.71 = 8,087.61 : x
  2. Step 2: Convert to fraction form
    21,235.58/31,867.71 = 8,087.61/x
  3. Step 3: Cross multiply
    21,235.58x = 31,867.71 × 8,087.61
  4. Step 4: Simplify right side
    21,235.58x = 257,733,610.07
  5. Step 5: Solve for x
    x = 257,733,610.07/21,235.58
  6. Step 6: Final answer
    x = 12,136.88

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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.