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Finding the Fourth Proportional to 18,741.20, 28,103.70 and 9,377.60

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Solution

The fourth proportional to 18,741.20, 28,103.70 and 9,377.60 is: 14,062.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,741.20 : 28,103.70 = 9,377.60 : x
  2. Step 2: Convert to fraction form
    18,741.20/28,103.70 = 9,377.60/x
  3. Step 3: Cross multiply
    18,741.20x = 28,103.70 × 9,377.60
  4. Step 4: Simplify right side
    18,741.20x = 263,545,257.12
  5. Step 5: Solve for x
    x = 263,545,257.12/18,741.20
  6. Step 6: Final answer
    x = 14,062.35

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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.