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Finding the Fourth Proportional to 13,682.41, 18,881.72 and 7,394.78

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Solution

The fourth proportional to 13,682.41, 18,881.72 and 7,394.78 is: 10,204.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,682.41 : 18,881.72 = 7,394.78 : x
  2. Step 2: Convert to fraction form
    13,682.41/18,881.72 = 7,394.78/x
  3. Step 3: Cross multiply
    13,682.41x = 18,881.72 × 7,394.78
  4. Step 4: Simplify right side
    13,682.41x = 139,626,165.42
  5. Step 5: Solve for x
    x = 139,626,165.42/13,682.41
  6. Step 6: Final answer
    x = 10,204.80

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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.