Home / 20,616.39-28,450.80-11,185.14

Finding the Fourth Proportional to 20,616.39, 28,450.80 and 11,185.14

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Solution

The fourth proportional to 20,616.39, 28,450.80 and 11,185.14 is: 15,435.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616.39 : 28,450.80 = 11,185.14 : x
  2. Step 2: Convert to fraction form
    20,616.39/28,450.80 = 11,185.14/x
  3. Step 3: Cross multiply
    20,616.39x = 28,450.80 × 11,185.14
  4. Step 4: Simplify right side
    20,616.39x = 318,226,181.11
  5. Step 5: Solve for x
    x = 318,226,181.11/20,616.39
  6. Step 6: Final answer
    x = 15,435.59

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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.