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Finding the Fourth Proportional to 18,819.09, 25,969.45 and 10,863.87

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Solution

The fourth proportional to 18,819.09, 25,969.45 and 10,863.87 is: 14,991.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.09 : 25,969.45 = 10,863.87 : x
  2. Step 2: Convert to fraction form
    18,819.09/25,969.45 = 10,863.87/x
  3. Step 3: Cross multiply
    18,819.09x = 25,969.45 × 10,863.87
  4. Step 4: Simplify right side
    18,819.09x = 282,128,728.77
  5. Step 5: Solve for x
    x = 282,128,728.77/18,819.09
  6. Step 6: Final answer
    x = 14,991.62

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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.