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Finding the Fourth Proportional to 13,661.88, 18,853.74 and 8,359.68

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Solution

The fourth proportional to 13,661.88, 18,853.74 and 8,359.68 is: 11,536.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.88 : 18,853.74 = 8,359.68 : x
  2. Step 2: Convert to fraction form
    13,661.88/18,853.74 = 8,359.68/x
  3. Step 3: Cross multiply
    13,661.88x = 18,853.74 × 8,359.68
  4. Step 4: Simplify right side
    13,661.88x = 157,611,233.20
  5. Step 5: Solve for x
    x = 157,611,233.20/13,661.88
  6. Step 6: Final answer
    x = 11,536.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.