Home / 19,141.28-28,704.64-12,565.72

Finding the Fourth Proportional to 19,141.28, 28,704.64 and 12,565.72

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Solution

The fourth proportional to 19,141.28, 28,704.64 and 12,565.72 is: 18,843.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,141.28 : 28,704.64 = 12,565.72 : x
  2. Step 2: Convert to fraction form
    19,141.28/28,704.64 = 12,565.72/x
  3. Step 3: Cross multiply
    19,141.28x = 28,704.64 × 12,565.72
  4. Step 4: Simplify right side
    19,141.28x = 360,694,468.94
  5. Step 5: Solve for x
    x = 360,694,468.94/19,141.28
  6. Step 6: Final answer
    x = 18,843.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.