Home / 20,912.36-31,379.29-13,897.19

Finding the Fourth Proportional to 20,912.36, 31,379.29 and 13,897.19

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Solution

The fourth proportional to 20,912.36, 31,379.29 and 13,897.19 is: 20,852.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.36 : 31,379.29 = 13,897.19 : x
  2. Step 2: Convert to fraction form
    20,912.36/31,379.29 = 13,897.19/x
  3. Step 3: Cross multiply
    20,912.36x = 31,379.29 × 13,897.19
  4. Step 4: Simplify right side
    20,912.36x = 436,083,998.90
  5. Step 5: Solve for x
    x = 436,083,998.90/20,912.36
  6. Step 6: Final answer
    x = 20,852.94

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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.