Home / 20,996.75-31,495.13-7,145.75

Finding the Fourth Proportional to 20,996.75, 31,495.13 and 7,145.75

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Solution

The fourth proportional to 20,996.75, 31,495.13 and 7,145.75 is: 10,718.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.75 : 31,495.13 = 7,145.75 : x
  2. Step 2: Convert to fraction form
    20,996.75/31,495.13 = 7,145.75/x
  3. Step 3: Cross multiply
    20,996.75x = 31,495.13 × 7,145.75
  4. Step 4: Simplify right side
    20,996.75x = 225,056,325.20
  5. Step 5: Solve for x
    x = 225,056,325.20/20,996.75
  6. Step 6: Final answer
    x = 10,718.63

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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.