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Finding the Fourth Proportional to 19,272.64, 28,913.04 and 7,426.72

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Solution

The fourth proportional to 19,272.64, 28,913.04 and 7,426.72 is: 11,141.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,272.64 : 28,913.04 = 7,426.72 : x
  2. Step 2: Convert to fraction form
    19,272.64/28,913.04 = 7,426.72/x
  3. Step 3: Cross multiply
    19,272.64x = 28,913.04 × 7,426.72
  4. Step 4: Simplify right side
    19,272.64x = 214,729,052.43
  5. Step 5: Solve for x
    x = 214,729,052.43/19,272.64
  6. Step 6: Final answer
    x = 11,141.65

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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.