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Finding the Fourth Proportional to 18,854.80, 28,268.22 and 9,487.96

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Solution

The fourth proportional to 18,854.80, 28,268.22 and 9,487.96 is: 14,224.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,854.80 : 28,268.22 = 9,487.96 : x
  2. Step 2: Convert to fraction form
    18,854.80/28,268.22 = 9,487.96/x
  3. Step 3: Cross multiply
    18,854.80x = 28,268.22 × 9,487.96
  4. Step 4: Simplify right side
    18,854.80x = 268,207,740.63
  5. Step 5: Solve for x
    x = 268,207,740.63/18,854.80
  6. Step 6: Final answer
    x = 14,224.91

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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.