Home / 20,551.53-28,361.16-11,120.09

Finding the Fourth Proportional to 20,551.53, 28,361.16 and 11,120.09

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Solution

The fourth proportional to 20,551.53, 28,361.16 and 11,120.09 is: 15,345.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.53 : 28,361.16 = 11,120.09 : x
  2. Step 2: Convert to fraction form
    20,551.53/28,361.16 = 11,120.09/x
  3. Step 3: Cross multiply
    20,551.53x = 28,361.16 × 11,120.09
  4. Step 4: Simplify right side
    20,551.53x = 315,378,722.61
  5. Step 5: Solve for x
    x = 315,378,722.61/20,551.53
  6. Step 6: Final answer
    x = 15,345.75

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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.