Home / 20,078.17-27,708.06-11,125.78

Finding the Fourth Proportional to 20,078.17, 27,708.06 and 11,125.78

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Solution

The fourth proportional to 20,078.17, 27,708.06 and 11,125.78 is: 15,353.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.17 : 27,708.06 = 11,125.78 : x
  2. Step 2: Convert to fraction form
    20,078.17/27,708.06 = 11,125.78/x
  3. Step 3: Cross multiply
    20,078.17x = 27,708.06 × 11,125.78
  4. Step 4: Simplify right side
    20,078.17x = 308,273,779.79
  5. Step 5: Solve for x
    x = 308,273,779.79/20,078.17
  6. Step 6: Final answer
    x = 15,353.68

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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.