Home / 20,278.25-27,983.92-11,325.76

Finding the Fourth Proportional to 20,278.25, 27,983.92 and 11,325.76

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Solution

The fourth proportional to 20,278.25, 27,983.92 and 11,325.76 is: 15,629.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.25 : 27,983.92 = 11,325.76 : x
  2. Step 2: Convert to fraction form
    20,278.25/27,983.92 = 11,325.76/x
  3. Step 3: Cross multiply
    20,278.25x = 27,983.92 × 11,325.76
  4. Step 4: Simplify right side
    20,278.25x = 316,939,021.86
  5. Step 5: Solve for x
    x = 316,939,021.86/20,278.25
  6. Step 6: Final answer
    x = 15,629.51

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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.