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Finding the Fourth Proportional to 13,671.42, 18,874.74 and 8,963.90

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Solution

The fourth proportional to 13,671.42, 18,874.74 and 8,963.90 is: 12,375.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,671.42 : 18,874.74 = 8,963.90 : x
  2. Step 2: Convert to fraction form
    13,671.42/18,874.74 = 8,963.90/x
  3. Step 3: Cross multiply
    13,671.42x = 18,874.74 × 8,963.90
  4. Step 4: Simplify right side
    13,671.42x = 169,191,281.89
  5. Step 5: Solve for x
    x = 169,191,281.89/13,671.42
  6. Step 6: Final answer
    x = 12,375.55

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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.