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Finding the Fourth Proportional to 18,662.32, 27,978.36 and 6,973.84

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Solution

The fourth proportional to 18,662.32, 27,978.36 and 6,973.84 is: 10,455.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.32 : 27,978.36 = 6,973.84 : x
  2. Step 2: Convert to fraction form
    18,662.32/27,978.36 = 6,973.84/x
  3. Step 3: Cross multiply
    18,662.32x = 27,978.36 × 6,973.84
  4. Step 4: Simplify right side
    18,662.32x = 195,116,606.10
  5. Step 5: Solve for x
    x = 195,116,606.10/18,662.32
  6. Step 6: Final answer
    x = 10,455.11

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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.