Home / 20,813.60-31,171.08-11,933.76

Finding the Fourth Proportional to 20,813.60, 31,171.08 and 11,933.76

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Solution

The fourth proportional to 20,813.60, 31,171.08 and 11,933.76 is: 17,872.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.60 : 31,171.08 = 11,933.76 : x
  2. Step 2: Convert to fraction form
    20,813.60/31,171.08 = 11,933.76/x
  3. Step 3: Cross multiply
    20,813.60x = 31,171.08 × 11,933.76
  4. Step 4: Simplify right side
    20,813.60x = 371,988,187.66
  5. Step 5: Solve for x
    x = 371,988,187.66/20,813.60
  6. Step 6: Final answer
    x = 17,872.36

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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.