Home / 20,428.72-28,178.64-17,016.88

Finding the Fourth Proportional to 20,428.72, 28,178.64 and 17,016.88

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Solution

The fourth proportional to 20,428.72, 28,178.64 and 17,016.88 is: 23,472.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.72 : 28,178.64 = 17,016.88 : x
  2. Step 2: Convert to fraction form
    20,428.72/28,178.64 = 17,016.88/x
  3. Step 3: Cross multiply
    20,428.72x = 28,178.64 × 17,016.88
  4. Step 4: Simplify right side
    20,428.72x = 479,512,535.44
  5. Step 5: Solve for x
    x = 479,512,535.44/20,428.72
  6. Step 6: Final answer
    x = 23,472.47

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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.