Home / 20,120.13-27,765.36-11,167.56

Finding the Fourth Proportional to 20,120.13, 27,765.36 and 11,167.56

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Solution

The fourth proportional to 20,120.13, 27,765.36 and 11,167.56 is: 15,411.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.13 : 27,765.36 = 11,167.56 : x
  2. Step 2: Convert to fraction form
    20,120.13/27,765.36 = 11,167.56/x
  3. Step 3: Cross multiply
    20,120.13x = 27,765.36 × 11,167.56
  4. Step 4: Simplify right side
    20,120.13x = 310,071,323.72
  5. Step 5: Solve for x
    x = 310,071,323.72/20,120.13
  6. Step 6: Final answer
    x = 15,411.00

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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.