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Finding the Fourth Proportional to 18,321.64, 27,483.52 and 5,172.91

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Solution

The fourth proportional to 18,321.64, 27,483.52 and 5,172.91 is: 7,759.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,321.64 : 27,483.52 = 5,172.91 : x
  2. Step 2: Convert to fraction form
    18,321.64/27,483.52 = 5,172.91/x
  3. Step 3: Cross multiply
    18,321.64x = 27,483.52 × 5,172.91
  4. Step 4: Simplify right side
    18,321.64x = 142,169,775.44
  5. Step 5: Solve for x
    x = 142,169,775.44/18,321.64
  6. Step 6: Final answer
    x = 7,759.66

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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.