Home / 20,990.58-31,496.42-13,091.04

Finding the Fourth Proportional to 20,990.58, 31,496.42 and 13,091.04

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Solution

The fourth proportional to 20,990.58, 31,496.42 and 13,091.04 is: 19,643.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.58 : 31,496.42 = 13,091.04 : x
  2. Step 2: Convert to fraction form
    20,990.58/31,496.42 = 13,091.04/x
  3. Step 3: Cross multiply
    20,990.58x = 31,496.42 × 13,091.04
  4. Step 4: Simplify right side
    20,990.58x = 412,320,828.62
  5. Step 5: Solve for x
    x = 412,320,828.62/20,990.58
  6. Step 6: Final answer
    x = 19,643.14

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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.