Home / 18,819.11-25,971.18-10,861.31

Finding the Fourth Proportional to 18,819.11, 25,971.18 and 10,861.31

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Solution

The fourth proportional to 18,819.11, 25,971.18 and 10,861.31 is: 14,989.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.11 : 25,971.18 = 10,861.31 : x
  2. Step 2: Convert to fraction form
    18,819.11/25,971.18 = 10,861.31/x
  3. Step 3: Cross multiply
    18,819.11x = 25,971.18 × 10,861.31
  4. Step 4: Simplify right side
    18,819.11x = 282,081,037.05
  5. Step 5: Solve for x
    x = 282,081,037.05/18,819.11
  6. Step 6: Final answer
    x = 14,989.07

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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.