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Finding the Fourth Proportional to 18,854.64, 28,282.11 and 5,708.04

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Solution

The fourth proportional to 18,854.64, 28,282.11 and 5,708.04 is: 8,562.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,854.64 : 28,282.11 = 5,708.04 : x
  2. Step 2: Convert to fraction form
    18,854.64/28,282.11 = 5,708.04/x
  3. Step 3: Cross multiply
    18,854.64x = 28,282.11 × 5,708.04
  4. Step 4: Simplify right side
    18,854.64x = 161,435,415.16
  5. Step 5: Solve for x
    x = 161,435,415.16/18,854.64
  6. Step 6: Final answer
    x = 8,562.11

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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.