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Finding the Fourth Proportional to 11,857.44, 17,785.74 and 5,620.44

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Solution

The fourth proportional to 11,857.44, 17,785.74 and 5,620.44 is: 8,430.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,857.44 : 17,785.74 = 5,620.44 : x
  2. Step 2: Convert to fraction form
    11,857.44/17,785.74 = 5,620.44/x
  3. Step 3: Cross multiply
    11,857.44x = 17,785.74 × 5,620.44
  4. Step 4: Simplify right side
    11,857.44x = 99,963,684.53
  5. Step 5: Solve for x
    x = 99,963,684.53/11,857.44
  6. Step 6: Final answer
    x = 8,430.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.