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Finding the Fourth Proportional to 13,861.80, 19,129.68 and 7,893.54

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Solution

The fourth proportional to 13,861.80, 19,129.68 and 7,893.54 is: 10,893.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,861.80 : 19,129.68 = 7,893.54 : x
  2. Step 2: Convert to fraction form
    13,861.80/19,129.68 = 7,893.54/x
  3. Step 3: Cross multiply
    13,861.80x = 19,129.68 × 7,893.54
  4. Step 4: Simplify right side
    13,861.80x = 151,000,894.27
  5. Step 5: Solve for x
    x = 151,000,894.27/13,861.80
  6. Step 6: Final answer
    x = 10,893.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.