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Finding the Fourth Proportional to 18,732.67, 28,106.70 and 8,869.30

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Solution

The fourth proportional to 18,732.67, 28,106.70 and 8,869.30 is: 13,307.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,732.67 : 28,106.70 = 8,869.30 : x
  2. Step 2: Convert to fraction form
    18,732.67/28,106.70 = 8,869.30/x
  3. Step 3: Cross multiply
    18,732.67x = 28,106.70 × 8,869.30
  4. Step 4: Simplify right side
    18,732.67x = 249,286,754.31
  5. Step 5: Solve for x
    x = 249,286,754.31/18,732.67
  6. Step 6: Final answer
    x = 13,307.59

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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.