Home / 20,742.36-31,093.29-8,258.64

Finding the Fourth Proportional to 20,742.36, 31,093.29 and 8,258.64

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Solution

The fourth proportional to 20,742.36, 31,093.29 and 8,258.64 is: 12,379.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.36 : 31,093.29 = 8,258.64 : x
  2. Step 2: Convert to fraction form
    20,742.36/31,093.29 = 8,258.64/x
  3. Step 3: Cross multiply
    20,742.36x = 31,093.29 × 8,258.64
  4. Step 4: Simplify right side
    20,742.36x = 256,788,288.53
  5. Step 5: Solve for x
    x = 256,788,288.53/20,742.36
  6. Step 6: Final answer
    x = 12,379.90

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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.