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Finding the Fourth Proportional to 28,982.55, 43,480.07 and 8,991.65

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Solution

The fourth proportional to 28,982.55, 43,480.07 and 8,991.65 is: 13,489.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,982.55 : 43,480.07 = 8,991.65 : x
  2. Step 2: Convert to fraction form
    28,982.55/43,480.07 = 8,991.65/x
  3. Step 3: Cross multiply
    28,982.55x = 43,480.07 × 8,991.65
  4. Step 4: Simplify right side
    28,982.55x = 390,957,571.42
  5. Step 5: Solve for x
    x = 390,957,571.42/28,982.55
  6. Step 6: Final answer
    x = 13,489.41

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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.