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Finding the Fourth Proportional to 11,680.12, 17,520.12 and 3,888.91

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Solution

The fourth proportional to 11,680.12, 17,520.12 and 3,888.91 is: 5,833.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,680.12 : 17,520.12 = 3,888.91 : x
  2. Step 2: Convert to fraction form
    11,680.12/17,520.12 = 3,888.91/x
  3. Step 3: Cross multiply
    11,680.12x = 17,520.12 × 3,888.91
  4. Step 4: Simplify right side
    11,680.12x = 68,134,169.87
  5. Step 5: Solve for x
    x = 68,134,169.87/11,680.12
  6. Step 6: Final answer
    x = 5,833.35

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1.5x scale

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.