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Finding the Fourth Proportional to 18,672.81, 28,008.64 and 7,579.23

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Solution

The fourth proportional to 18,672.81, 28,008.64 and 7,579.23 is: 11,368.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.81 : 28,008.64 = 7,579.23 : x
  2. Step 2: Convert to fraction form
    18,672.81/28,008.64 = 7,579.23/x
  3. Step 3: Cross multiply
    18,672.81x = 28,008.64 × 7,579.23
  4. Step 4: Simplify right side
    18,672.81x = 212,283,924.55
  5. Step 5: Solve for x
    x = 212,283,924.55/18,672.81
  6. Step 6: Final answer
    x = 11,368.61

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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.