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Finding the Fourth Proportional to 18,505.78, 27,739.17 and 7,973.32

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Solution

The fourth proportional to 18,505.78, 27,739.17 and 7,973.32 is: 11,951.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,505.78 : 27,739.17 = 7,973.32 : x
  2. Step 2: Convert to fraction form
    18,505.78/27,739.17 = 7,973.32/x
  3. Step 3: Cross multiply
    18,505.78x = 27,739.17 × 7,973.32
  4. Step 4: Simplify right side
    18,505.78x = 221,173,278.94
  5. Step 5: Solve for x
    x = 221,173,278.94/18,505.78
  6. Step 6: Final answer
    x = 11,951.58

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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.