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Finding the Fourth Proportional to 13,379.34, 18,462.68 and 7,855.68

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Solution

The fourth proportional to 13,379.34, 18,462.68 and 7,855.68 is: 10,840.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,379.34 : 18,462.68 = 7,855.68 : x
  2. Step 2: Convert to fraction form
    13,379.34/18,462.68 = 7,855.68/x
  3. Step 3: Cross multiply
    13,379.34x = 18,462.68 × 7,855.68
  4. Step 4: Simplify right side
    13,379.34x = 145,036,906.02
  5. Step 5: Solve for x
    x = 145,036,906.02/13,379.34
  6. Step 6: Final answer
    x = 10,840.36

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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.