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Finding the Fourth Proportional to 12,326.51, 18,489.90 and 3,561.50

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Solution

The fourth proportional to 12,326.51, 18,489.90 and 3,561.50 is: 5,342.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,326.51 : 18,489.90 = 3,561.50 : x
  2. Step 2: Convert to fraction form
    12,326.51/18,489.90 = 3,561.50/x
  3. Step 3: Cross multiply
    12,326.51x = 18,489.90 × 3,561.50
  4. Step 4: Simplify right side
    12,326.51x = 65,851,778.85
  5. Step 5: Solve for x
    x = 65,851,778.85/12,326.51
  6. Step 6: Final answer
    x = 5,342.29

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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.