Home / 13,692.57-20,498.81-12,379.35

Finding the Fourth Proportional to 13,692.57, 20,498.81 and 12,379.35

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Solution

The fourth proportional to 13,692.57, 20,498.81 and 12,379.35 is: 18,532.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,692.57 : 20,498.81 = 12,379.35 : x
  2. Step 2: Convert to fraction form
    13,692.57/20,498.81 = 12,379.35/x
  3. Step 3: Cross multiply
    13,692.57x = 20,498.81 × 12,379.35
  4. Step 4: Simplify right side
    13,692.57x = 253,761,943.57
  5. Step 5: Solve for x
    x = 253,761,943.57/13,692.57
  6. Step 6: Final answer
    x = 18,532.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.