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Finding the Fourth Proportional to 18,855.50, 28,287.82 and 5,707.12

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Solution

The fourth proportional to 18,855.50, 28,287.82 and 5,707.12 is: 8,562.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855.50 : 28,287.82 = 5,707.12 : x
  2. Step 2: Convert to fraction form
    18,855.50/28,287.82 = 5,707.12/x
  3. Step 3: Cross multiply
    18,855.50x = 28,287.82 × 5,707.12
  4. Step 4: Simplify right side
    18,855.50x = 161,441,983.28
  5. Step 5: Solve for x
    x = 161,441,983.28/18,855.50
  6. Step 6: Final answer
    x = 8,562.06

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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.