Home / 13,379.98-18,446.86-11,511.63

Finding the Fourth Proportional to 13,379.98, 18,446.86 and 11,511.63

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Solution

The fourth proportional to 13,379.98, 18,446.86 and 11,511.63 is: 15,870.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,379.98 : 18,446.86 = 11,511.63 : x
  2. Step 2: Convert to fraction form
    13,379.98/18,446.86 = 11,511.63/x
  3. Step 3: Cross multiply
    13,379.98x = 18,446.86 × 11,511.63
  4. Step 4: Simplify right side
    13,379.98x = 212,353,426.98
  5. Step 5: Solve for x
    x = 212,353,426.98/13,379.98
  6. Step 6: Final answer
    x = 15,870.98

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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.