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Finding the Fourth Proportional to 18,409.53, 25,404.57 and 10,856.33

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Solution

The fourth proportional to 18,409.53, 25,404.57 and 10,856.33 is: 14,981.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,409.53 : 25,404.57 = 10,856.33 : x
  2. Step 2: Convert to fraction form
    18,409.53/25,404.57 = 10,856.33/x
  3. Step 3: Cross multiply
    18,409.53x = 25,404.57 × 10,856.33
  4. Step 4: Simplify right side
    18,409.53x = 275,800,268.41
  5. Step 5: Solve for x
    x = 275,800,268.41/18,409.53
  6. Step 6: Final answer
    x = 14,981.39

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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.