Home / 20,078.86-27,709.06-11,126.51

Finding the Fourth Proportional to 20,078.86, 27,709.06 and 11,126.51

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Solution

The fourth proportional to 20,078.86, 27,709.06 and 11,126.51 is: 15,354.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.86 : 27,709.06 = 11,126.51 : x
  2. Step 2: Convert to fraction form
    20,078.86/27,709.06 = 11,126.51/x
  3. Step 3: Cross multiply
    20,078.86x = 27,709.06 × 11,126.51
  4. Step 4: Simplify right side
    20,078.86x = 308,305,278.75
  5. Step 5: Solve for x
    x = 308,305,278.75/20,078.86
  6. Step 6: Final answer
    x = 15,354.72

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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.