Home / 20,551.50-28,361.07-11,120.13

Finding the Fourth Proportional to 20,551.50, 28,361.07 and 11,120.13

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Solution

The fourth proportional to 20,551.50, 28,361.07 and 11,120.13 is: 15,345.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.50 : 28,361.07 = 11,120.13 : x
  2. Step 2: Convert to fraction form
    20,551.50/28,361.07 = 11,120.13/x
  3. Step 3: Cross multiply
    20,551.50x = 28,361.07 × 11,120.13
  4. Step 4: Simplify right side
    20,551.50x = 315,378,785.34
  5. Step 5: Solve for x
    x = 315,378,785.34/20,551.50
  6. Step 6: Final answer
    x = 15,345.78

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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.