Home / 20,278.16-27,983.78-11,325.66

Finding the Fourth Proportional to 20,278.16, 27,983.78 and 11,325.66

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Solution

The fourth proportional to 20,278.16, 27,983.78 and 11,325.66 is: 15,629.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.16 : 27,983.78 = 11,325.66 : x
  2. Step 2: Convert to fraction form
    20,278.16/27,983.78 = 11,325.66/x
  3. Step 3: Cross multiply
    20,278.16x = 27,983.78 × 11,325.66
  4. Step 4: Simplify right side
    20,278.16x = 316,934,777.79
  5. Step 5: Solve for x
    x = 316,934,777.79/20,278.16
  6. Step 6: Final answer
    x = 15,629.37

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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.