Home / 13,379.39-18,455.20-8,605.55

Finding the Fourth Proportional to 13,379.39, 18,455.20 and 8,605.55

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Solution

The fourth proportional to 13,379.39, 18,455.20 and 8,605.55 is: 11,870.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,379.39 : 18,455.20 = 8,605.55 : x
  2. Step 2: Convert to fraction form
    13,379.39/18,455.20 = 8,605.55/x
  3. Step 3: Cross multiply
    13,379.39x = 18,455.20 × 8,605.55
  4. Step 4: Simplify right side
    13,379.39x = 158,817,257.44
  5. Step 5: Solve for x
    x = 158,817,257.44/13,379.39
  6. Step 6: Final answer
    x = 11,870.29

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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.