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Finding the Fourth Proportional to 18,735.53, 28,117.15 and 8,874.83

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Solution

The fourth proportional to 18,735.53, 28,117.15 and 8,874.83 is: 13,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,735.53 : 28,117.15 = 8,874.83 : x
  2. Step 2: Convert to fraction form
    18,735.53/28,117.15 = 8,874.83/x
  3. Step 3: Cross multiply
    18,735.53x = 28,117.15 × 8,874.83
  4. Step 4: Simplify right side
    18,735.53x = 249,534,763.56
  5. Step 5: Solve for x
    x = 249,534,763.56/18,735.53
  6. Step 6: Final answer
    x = 13,318.80

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1.5x scale

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.