Home / 12,728.12-19,084.50-5,706.86

Finding the Fourth Proportional to 12,728.12, 19,084.50 and 5,706.86

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Solution

The fourth proportional to 12,728.12, 19,084.50 and 5,706.86 is: 8,556.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.12 : 19,084.50 = 5,706.86 : x
  2. Step 2: Convert to fraction form
    12,728.12/19,084.50 = 5,706.86/x
  3. Step 3: Cross multiply
    12,728.12x = 19,084.50 × 5,706.86
  4. Step 4: Simplify right side
    12,728.12x = 108,912,569.67
  5. Step 5: Solve for x
    x = 108,912,569.67/12,728.12
  6. Step 6: Final answer
    x = 8,556.85

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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.