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Finding the Fourth Proportional to 18,421.78, 27,654.15 and 9,069.52

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Solution

The fourth proportional to 18,421.78, 27,654.15 and 9,069.52 is: 13,614.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421.78 : 27,654.15 = 9,069.52 : x
  2. Step 2: Convert to fraction form
    18,421.78/27,654.15 = 9,069.52/x
  3. Step 3: Cross multiply
    18,421.78x = 27,654.15 × 9,069.52
  4. Step 4: Simplify right side
    18,421.78x = 250,809,866.51
  5. Step 5: Solve for x
    x = 250,809,866.51/18,421.78
  6. Step 6: Final answer
    x = 13,614.86

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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.