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Finding the Fourth Proportional to 18,438.80, 27,656.37 and 7,342.50

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Solution

The fourth proportional to 18,438.80, 27,656.37 and 7,342.50 is: 11,013.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.80 : 27,656.37 = 7,342.50 : x
  2. Step 2: Convert to fraction form
    18,438.80/27,656.37 = 7,342.50/x
  3. Step 3: Cross multiply
    18,438.80x = 27,656.37 × 7,342.50
  4. Step 4: Simplify right side
    18,438.80x = 203,066,860.01
  5. Step 5: Solve for x
    x = 203,066,860.01/18,438.80
  6. Step 6: Final answer
    x = 11,013.02

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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.