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Finding the Fourth Proportional to 13,679.01, 18,878.46 and 8,377.35

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Solution

The fourth proportional to 13,679.01, 18,878.46 and 8,377.35 is: 11,561.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.01 : 18,878.46 = 8,377.35 : x
  2. Step 2: Convert to fraction form
    13,679.01/18,878.46 = 8,377.35/x
  3. Step 3: Cross multiply
    13,679.01x = 18,878.46 × 8,377.35
  4. Step 4: Simplify right side
    13,679.01x = 158,151,466.88
  5. Step 5: Solve for x
    x = 158,151,466.88/13,679.01
  6. Step 6: Final answer
    x = 11,561.62

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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.