Home / 13,778.16-19,013.45-8,111.61

Finding the Fourth Proportional to 13,778.16, 19,013.45 and 8,111.61

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Solution

The fourth proportional to 13,778.16, 19,013.45 and 8,111.61 is: 11,193.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.16 : 19,013.45 = 8,111.61 : x
  2. Step 2: Convert to fraction form
    13,778.16/19,013.45 = 8,111.61/x
  3. Step 3: Cross multiply
    13,778.16x = 19,013.45 × 8,111.61
  4. Step 4: Simplify right side
    13,778.16x = 154,229,650.60
  5. Step 5: Solve for x
    x = 154,229,650.60/13,778.16
  6. Step 6: Final answer
    x = 11,193.78

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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.