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Finding the Fourth Proportional to 13,394.67, 18,484.50 and 7,729.35

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Solution

The fourth proportional to 13,394.67, 18,484.50 and 7,729.35 is: 10,666.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,394.67 : 18,484.50 = 7,729.35 : x
  2. Step 2: Convert to fraction form
    13,394.67/18,484.50 = 7,729.35/x
  3. Step 3: Cross multiply
    13,394.67x = 18,484.50 × 7,729.35
  4. Step 4: Simplify right side
    13,394.67x = 142,873,170.08
  5. Step 5: Solve for x
    x = 142,873,170.08/13,394.67
  6. Step 6: Final answer
    x = 10,666.42

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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.