Home / 20,616.90-28,451.40-11,185.46

Finding the Fourth Proportional to 20,616.90, 28,451.40 and 11,185.46

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Solution

The fourth proportional to 20,616.90, 28,451.40 and 11,185.46 is: 15,435.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616.90 : 28,451.40 = 11,185.46 : x
  2. Step 2: Convert to fraction form
    20,616.90/28,451.40 = 11,185.46/x
  3. Step 3: Cross multiply
    20,616.90x = 28,451.40 × 11,185.46
  4. Step 4: Simplify right side
    20,616.90x = 318,241,982.05
  5. Step 5: Solve for x
    x = 318,241,982.05/20,616.90
  6. Step 6: Final answer
    x = 15,435.98

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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.