Home / 20,679.36-31,032.83-13,289.12

Finding the Fourth Proportional to 20,679.36, 31,032.83 and 13,289.12

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Solution

The fourth proportional to 20,679.36, 31,032.83 and 13,289.12 is: 19,942.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.36 : 31,032.83 = 13,289.12 : x
  2. Step 2: Convert to fraction form
    20,679.36/31,032.83 = 13,289.12/x
  3. Step 3: Cross multiply
    20,679.36x = 31,032.83 × 13,289.12
  4. Step 4: Simplify right side
    20,679.36x = 412,398,780.20
  5. Step 5: Solve for x
    x = 412,398,780.20/20,679.36
  6. Step 6: Final answer
    x = 19,942.53

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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.