Home / 20,616.48-28,450.80-11,185.02

Finding the Fourth Proportional to 20,616.48, 28,450.80 and 11,185.02

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Solution

The fourth proportional to 20,616.48, 28,450.80 and 11,185.02 is: 15,435.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616.48 : 28,450.80 = 11,185.02 : x
  2. Step 2: Convert to fraction form
    20,616.48/28,450.80 = 11,185.02/x
  3. Step 3: Cross multiply
    20,616.48x = 28,450.80 × 11,185.02
  4. Step 4: Simplify right side
    20,616.48x = 318,222,767.02
  5. Step 5: Solve for x
    x = 318,222,767.02/20,616.48
  6. Step 6: Final answer
    x = 15,435.36

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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.