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Finding the Fourth Proportional to 13,689.44, 18,894.36 and 8,650.46

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Solution

The fourth proportional to 13,689.44, 18,894.36 and 8,650.46 is: 11,939.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.44 : 18,894.36 = 8,650.46 : x
  2. Step 2: Convert to fraction form
    13,689.44/18,894.36 = 8,650.46/x
  3. Step 3: Cross multiply
    13,689.44x = 18,894.36 × 8,650.46
  4. Step 4: Simplify right side
    13,689.44x = 163,444,905.41
  5. Step 5: Solve for x
    x = 163,444,905.41/13,689.44
  6. Step 6: Final answer
    x = 11,939.49

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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.