Home / 20,111.13-27,749.30-12,153.78

Finding the Fourth Proportional to 20,111.13, 27,749.30 and 12,153.78

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Solution

The fourth proportional to 20,111.13, 27,749.30 and 12,153.78 is: 16,769.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.13 : 27,749.30 = 12,153.78 : x
  2. Step 2: Convert to fraction form
    20,111.13/27,749.30 = 12,153.78/x
  3. Step 3: Cross multiply
    20,111.13x = 27,749.30 × 12,153.78
  4. Step 4: Simplify right side
    20,111.13x = 337,258,826.59
  5. Step 5: Solve for x
    x = 337,258,826.59/20,111.13
  6. Step 6: Final answer
    x = 16,769.76

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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.