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Finding the Fourth Proportional to 28,773.63, 43,174.42 and 12,989.57

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Solution

The fourth proportional to 28,773.63, 43,174.42 and 12,989.57 is: 19,490.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,773.63 : 43,174.42 = 12,989.57 : x
  2. Step 2: Convert to fraction form
    28,773.63/43,174.42 = 12,989.57/x
  3. Step 3: Cross multiply
    28,773.63x = 43,174.42 × 12,989.57
  4. Step 4: Simplify right side
    28,773.63x = 560,816,902.45
  5. Step 5: Solve for x
    x = 560,816,902.45/28,773.63
  6. Step 6: Final answer
    x = 19,490.66

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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.