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Finding the Fourth Proportional to 18,467.80, 27,701.70 and 5,320.60

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Solution

The fourth proportional to 18,467.80, 27,701.70 and 5,320.60 is: 7,980.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,467.80 : 27,701.70 = 5,320.60 : x
  2. Step 2: Convert to fraction form
    18,467.80/27,701.70 = 5,320.60/x
  3. Step 3: Cross multiply
    18,467.80x = 27,701.70 × 5,320.60
  4. Step 4: Simplify right side
    18,467.80x = 147,389,665.02
  5. Step 5: Solve for x
    x = 147,389,665.02/18,467.80
  6. Step 6: Final answer
    x = 7,980.90

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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.