Home / 20,851.16-31,279.32-6,812.60

Finding the Fourth Proportional to 20,851.16, 31,279.32 and 6,812.60

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Solution

The fourth proportional to 20,851.16, 31,279.32 and 6,812.60 is: 10,219.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.16 : 31,279.32 = 6,812.60 : x
  2. Step 2: Convert to fraction form
    20,851.16/31,279.32 = 6,812.60/x
  3. Step 3: Cross multiply
    20,851.16x = 31,279.32 × 6,812.60
  4. Step 4: Simplify right side
    20,851.16x = 213,093,495.43
  5. Step 5: Solve for x
    x = 213,093,495.43/20,851.16
  6. Step 6: Final answer
    x = 10,219.74

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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.