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Finding the Fourth Proportional to 18,772.10, 28,144.92 and 9,405.42

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Solution

The fourth proportional to 18,772.10, 28,144.92 and 9,405.42 is: 14,101.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.10 : 28,144.92 = 9,405.42 : x
  2. Step 2: Convert to fraction form
    18,772.10/28,144.92 = 9,405.42/x
  3. Step 3: Cross multiply
    18,772.10x = 28,144.92 × 9,405.42
  4. Step 4: Simplify right side
    18,772.10x = 264,714,670.29
  5. Step 5: Solve for x
    x = 264,714,670.29/18,772.10
  6. Step 6: Final answer
    x = 14,101.49

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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.