Home / 20,395.20-28,146.72-11,443.32

Finding the Fourth Proportional to 20,395.20, 28,146.72 and 11,443.32

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Solution

The fourth proportional to 20,395.20, 28,146.72 and 11,443.32 is: 15,792.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.20 : 28,146.72 = 11,443.32 : x
  2. Step 2: Convert to fraction form
    20,395.20/28,146.72 = 11,443.32/x
  3. Step 3: Cross multiply
    20,395.20x = 28,146.72 × 11,443.32
  4. Step 4: Simplify right side
    20,395.20x = 322,091,923.91
  5. Step 5: Solve for x
    x = 322,091,923.91/20,395.20
  6. Step 6: Final answer
    x = 15,792.54

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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.