Home / 18,403.11-25,388.78-12,817.35

Finding the Fourth Proportional to 18,403.11, 25,388.78 and 12,817.35

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Solution

The fourth proportional to 18,403.11, 25,388.78 and 12,817.35 is: 17,682.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,403.11 : 25,388.78 = 12,817.35 : x
  2. Step 2: Convert to fraction form
    18,403.11/25,388.78 = 12,817.35/x
  3. Step 3: Cross multiply
    18,403.11x = 25,388.78 × 12,817.35
  4. Step 4: Simplify right side
    18,403.11x = 325,416,815.25
  5. Step 5: Solve for x
    x = 325,416,815.25/18,403.11
  6. Step 6: Final answer
    x = 17,682.71

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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.