Home / 20,857.54-28,783.96-11,782.18

Finding the Fourth Proportional to 20,857.54, 28,783.96 and 11,782.18

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Solution

The fourth proportional to 20,857.54, 28,783.96 and 11,782.18 is: 16,259.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.54 : 28,783.96 = 11,782.18 : x
  2. Step 2: Convert to fraction form
    20,857.54/28,783.96 = 11,782.18/x
  3. Step 3: Cross multiply
    20,857.54x = 28,783.96 × 11,782.18
  4. Step 4: Simplify right side
    20,857.54x = 339,137,797.83
  5. Step 5: Solve for x
    x = 339,137,797.83/20,857.54
  6. Step 6: Final answer
    x = 16,259.72

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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.