Home / 20,812.52-31,180.98-12,028.88

Finding the Fourth Proportional to 20,812.52, 31,180.98 and 12,028.88

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Solution

The fourth proportional to 20,812.52, 31,180.98 and 12,028.88 is: 18,021.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.52 : 31,180.98 = 12,028.88 : x
  2. Step 2: Convert to fraction form
    20,812.52/31,180.98 = 12,028.88/x
  3. Step 3: Cross multiply
    20,812.52x = 31,180.98 × 12,028.88
  4. Step 4: Simplify right side
    20,812.52x = 375,072,266.70
  5. Step 5: Solve for x
    x = 375,072,266.70/20,812.52
  6. Step 6: Final answer
    x = 18,021.47

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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.