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Finding the Fourth Proportional to 18,999.48, 28,497.78 and 5,855.16

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Solution

The fourth proportional to 18,999.48, 28,497.78 and 5,855.16 is: 8,782.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.48 : 28,497.78 = 5,855.16 : x
  2. Step 2: Convert to fraction form
    18,999.48/28,497.78 = 5,855.16/x
  3. Step 3: Cross multiply
    18,999.48x = 28,497.78 × 5,855.16
  4. Step 4: Simplify right side
    18,999.48x = 166,859,061.54
  5. Step 5: Solve for x
    x = 166,859,061.54/18,999.48
  6. Step 6: Final answer
    x = 8,782.30

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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.