Home / 20,740.38-31,141.72-11,865.73

Finding the Fourth Proportional to 20,740.38, 31,141.72 and 11,865.73

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Solution

The fourth proportional to 20,740.38, 31,141.72 and 11,865.73 is: 17,816.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.38 : 31,141.72 = 11,865.73 : x
  2. Step 2: Convert to fraction form
    20,740.38/31,141.72 = 11,865.73/x
  3. Step 3: Cross multiply
    20,740.38x = 31,141.72 × 11,865.73
  4. Step 4: Simplify right side
    20,740.38x = 369,519,026.22
  5. Step 5: Solve for x
    x = 369,519,026.22/20,740.38
  6. Step 6: Final answer
    x = 17,816.41

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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.