Home / 21,318.45-31,959.44-8,180.25

Finding the Fourth Proportional to 21,318.45, 31,959.44 and 8,180.25

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Solution

The fourth proportional to 21,318.45, 31,959.44 and 8,180.25 is: 12,263.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.45 : 31,959.44 = 8,180.25 : x
  2. Step 2: Convert to fraction form
    21,318.45/31,959.44 = 8,180.25/x
  3. Step 3: Cross multiply
    21,318.45x = 31,959.44 × 8,180.25
  4. Step 4: Simplify right side
    21,318.45x = 261,436,209.06
  5. Step 5: Solve for x
    x = 261,436,209.06/21,318.45
  6. Step 6: Final answer
    x = 12,263.38

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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.