Home / 21,277.08-31,920.24-6,485.61

Finding the Fourth Proportional to 21,277.08, 31,920.24 and 6,485.61

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Solution

The fourth proportional to 21,277.08, 31,920.24 and 6,485.61 is: 9,729.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.08 : 31,920.24 = 6,485.61 : x
  2. Step 2: Convert to fraction form
    21,277.08/31,920.24 = 6,485.61/x
  3. Step 3: Cross multiply
    21,277.08x = 31,920.24 × 6,485.61
  4. Step 4: Simplify right side
    21,277.08x = 207,022,227.75
  5. Step 5: Solve for x
    x = 207,022,227.75/21,277.08
  6. Step 6: Final answer
    x = 9,729.82

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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.