Home / 11,129.15-16,692.64-2,921.15

Finding the Fourth Proportional to 11,129.15, 16,692.64 and 2,921.15

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Solution

The fourth proportional to 11,129.15, 16,692.64 and 2,921.15 is: 4,381.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,129.15 : 16,692.64 = 2,921.15 : x
  2. Step 2: Convert to fraction form
    11,129.15/16,692.64 = 2,921.15/x
  3. Step 3: Cross multiply
    11,129.15x = 16,692.64 × 2,921.15
  4. Step 4: Simplify right side
    11,129.15x = 48,761,705.34
  5. Step 5: Solve for x
    x = 48,761,705.34/11,129.15
  6. Step 6: Final answer
    x = 4,381.44

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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.