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Finding the Fourth Proportional to 18,835, 28,257.04 and 5,686.56

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Solution

The fourth proportional to 18,835, 28,257.04 and 5,686.56 is: 8,531.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,835 : 28,257.04 = 5,686.56 : x
  2. Step 2: Convert to fraction form
    18,835/28,257.04 = 5,686.56/x
  3. Step 3: Cross multiply
    18,835x = 28,257.04 × 5,686.56
  4. Step 4: Simplify right side
    18,835x = 160,685,353.38
  5. Step 5: Solve for x
    x = 160,685,353.38/18,835
  6. Step 6: Final answer
    x = 8,531.21

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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.