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Finding the Fourth Proportional to 13,682.54, 18,881.88 and 7,394.90

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Solution

The fourth proportional to 13,682.54, 18,881.88 and 7,394.90 is: 10,204.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,682.54 : 18,881.88 = 7,394.90 : x
  2. Step 2: Convert to fraction form
    13,682.54/18,881.88 = 7,394.90/x
  3. Step 3: Cross multiply
    13,682.54x = 18,881.88 × 7,394.90
  4. Step 4: Simplify right side
    13,682.54x = 139,629,614.41
  5. Step 5: Solve for x
    x = 139,629,614.41/13,682.54
  6. Step 6: Final answer
    x = 10,204.95

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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.