Home / 20,230.87-27,917.54-11,157.72

Finding the Fourth Proportional to 20,230.87, 27,917.54 and 11,157.72

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Solution

The fourth proportional to 20,230.87, 27,917.54 and 11,157.72 is: 15,397.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,230.87 : 27,917.54 = 11,157.72 : x
  2. Step 2: Convert to fraction form
    20,230.87/27,917.54 = 11,157.72/x
  3. Step 3: Cross multiply
    20,230.87x = 27,917.54 × 11,157.72
  4. Step 4: Simplify right side
    20,230.87x = 311,496,052.51
  5. Step 5: Solve for x
    x = 311,496,052.51/20,230.87
  6. Step 6: Final answer
    x = 15,397.07

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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.