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Finding the Fourth Proportional to 18,735.80, 28,103.70 and 4,884.80

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Solution

The fourth proportional to 18,735.80, 28,103.70 and 4,884.80 is: 7,327.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,735.80 : 28,103.70 = 4,884.80 : x
  2. Step 2: Convert to fraction form
    18,735.80/28,103.70 = 4,884.80/x
  3. Step 3: Cross multiply
    18,735.80x = 28,103.70 × 4,884.80
  4. Step 4: Simplify right side
    18,735.80x = 137,280,953.76
  5. Step 5: Solve for x
    x = 137,280,953.76/18,735.80
  6. Step 6: Final answer
    x = 7,327.20

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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.