Home / 20,616.64-28,450.84-11,185.00

Finding the Fourth Proportional to 20,616.64, 28,450.84 and 11,185.00

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Solution

The fourth proportional to 20,616.64, 28,450.84 and 11,185.00 is: 15,435.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616.64 : 28,450.84 = 11,185.00 : x
  2. Step 2: Convert to fraction form
    20,616.64/28,450.84 = 11,185.00/x
  3. Step 3: Cross multiply
    20,616.64x = 28,450.84 × 11,185.00
  4. Step 4: Simplify right side
    20,616.64x = 318,222,447.22
  5. Step 5: Solve for x
    x = 318,222,447.22/20,616.64
  6. Step 6: Final answer
    x = 15,435.23

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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.