Home / 20,982.40-31,550.40-17,603.20

Finding the Fourth Proportional to 20,982.40, 31,550.40 and 17,603.20

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Solution

The fourth proportional to 20,982.40, 31,550.40 and 17,603.20 is: 26,469.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.40 : 31,550.40 = 17,603.20 : x
  2. Step 2: Convert to fraction form
    20,982.40/31,550.40 = 17,603.20/x
  3. Step 3: Cross multiply
    20,982.40x = 31,550.40 × 17,603.20
  4. Step 4: Simplify right side
    20,982.40x = 555,388,001.28
  5. Step 5: Solve for x
    x = 555,388,001.28/20,982.40
  6. Step 6: Final answer
    x = 26,469.23

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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.