Home / 20,203.64-27,881.62-11,129.32

Finding the Fourth Proportional to 20,203.64, 27,881.62 and 11,129.32

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Solution

The fourth proportional to 20,203.64, 27,881.62 and 11,129.32 is: 15,358.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,203.64 : 27,881.62 = 11,129.32 : x
  2. Step 2: Convert to fraction form
    20,203.64/27,881.62 = 11,129.32/x
  3. Step 3: Cross multiply
    20,203.64x = 27,881.62 × 11,129.32
  4. Step 4: Simplify right side
    20,203.64x = 310,303,471.10
  5. Step 5: Solve for x
    x = 310,303,471.10/20,203.64
  6. Step 6: Final answer
    x = 15,358.79

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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.