Home / 20,802.45-28,712.54-11,855.26

Finding the Fourth Proportional to 20,802.45, 28,712.54 and 11,855.26

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Solution

The fourth proportional to 20,802.45, 28,712.54 and 11,855.26 is: 16,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.45 : 28,712.54 = 11,855.26 : x
  2. Step 2: Convert to fraction form
    20,802.45/28,712.54 = 11,855.26/x
  3. Step 3: Cross multiply
    20,802.45x = 28,712.54 × 11,855.26
  4. Step 4: Simplify right side
    20,802.45x = 340,394,626.96
  5. Step 5: Solve for x
    x = 340,394,626.96/20,802.45
  6. Step 6: Final answer
    x = 16,363.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.