Home / 20,883.72-28,791.54-13,807.56

Finding the Fourth Proportional to 20,883.72, 28,791.54 and 13,807.56

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Solution

The fourth proportional to 20,883.72, 28,791.54 and 13,807.56 is: 19,035.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.72 : 28,791.54 = 13,807.56 : x
  2. Step 2: Convert to fraction form
    20,883.72/28,791.54 = 13,807.56/x
  3. Step 3: Cross multiply
    20,883.72x = 28,791.54 × 13,807.56
  4. Step 4: Simplify right side
    20,883.72x = 397,540,916.04
  5. Step 5: Solve for x
    x = 397,540,916.04/20,883.72
  6. Step 6: Final answer
    x = 19,035.92

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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.