Home / 11,418.42-15,772.69-9,188.90

Finding the Fourth Proportional to 11,418.42, 15,772.69 and 9,188.90

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Solution

The fourth proportional to 11,418.42, 15,772.69 and 9,188.90 is: 12,692.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,418.42 : 15,772.69 = 9,188.90 : x
  2. Step 2: Convert to fraction form
    11,418.42/15,772.69 = 9,188.90/x
  3. Step 3: Cross multiply
    11,418.42x = 15,772.69 × 9,188.90
  4. Step 4: Simplify right side
    11,418.42x = 144,933,671.14
  5. Step 5: Solve for x
    x = 144,933,671.14/11,418.42
  6. Step 6: Final answer
    x = 12,692.97

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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.