Home / 20,696.20-31,049.12-5,905.32

Finding the Fourth Proportional to 20,696.20, 31,049.12 and 5,905.32

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Solution

The fourth proportional to 20,696.20, 31,049.12 and 5,905.32 is: 8,859.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,696.20 : 31,049.12 = 5,905.32 : x
  2. Step 2: Convert to fraction form
    20,696.20/31,049.12 = 5,905.32/x
  3. Step 3: Cross multiply
    20,696.20x = 31,049.12 × 5,905.32
  4. Step 4: Simplify right side
    20,696.20x = 183,354,989.32
  5. Step 5: Solve for x
    x = 183,354,989.32/20,696.20
  6. Step 6: Final answer
    x = 8,859.36

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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.