Home / 20,817.82-28,728.50-11,865.36

Finding the Fourth Proportional to 20,817.82, 28,728.50 and 11,865.36

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Solution

The fourth proportional to 20,817.82, 28,728.50 and 11,865.36 is: 16,374.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.82 : 28,728.50 = 11,865.36 : x
  2. Step 2: Convert to fraction form
    20,817.82/28,728.50 = 11,865.36/x
  3. Step 3: Cross multiply
    20,817.82x = 28,728.50 × 11,865.36
  4. Step 4: Simplify right side
    20,817.82x = 340,873,994.76
  5. Step 5: Solve for x
    x = 340,873,994.76/20,817.82
  6. Step 6: Final answer
    x = 16,374.14

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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.