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Finding the Fourth Proportional to 12,231.79, 18,354.74 and 6,609.47

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Solution

The fourth proportional to 12,231.79, 18,354.74 and 6,609.47 is: 9,918.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,231.79 : 18,354.74 = 6,609.47 : x
  2. Step 2: Convert to fraction form
    12,231.79/18,354.74 = 6,609.47/x
  3. Step 3: Cross multiply
    12,231.79x = 18,354.74 × 6,609.47
  4. Step 4: Simplify right side
    12,231.79x = 121,314,978.57
  5. Step 5: Solve for x
    x = 121,314,978.57/12,231.79
  6. Step 6: Final answer
    x = 9,918.01

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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.