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Finding the Fourth Proportional to 18,806.16, 25,944.15 and 12,090.54

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Solution

The fourth proportional to 18,806.16, 25,944.15 and 12,090.54 is: 16,679.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806.16 : 25,944.15 = 12,090.54 : x
  2. Step 2: Convert to fraction form
    18,806.16/25,944.15 = 12,090.54/x
  3. Step 3: Cross multiply
    18,806.16x = 25,944.15 × 12,090.54
  4. Step 4: Simplify right side
    18,806.16x = 313,678,783.34
  5. Step 5: Solve for x
    x = 313,678,783.34/18,806.16
  6. Step 6: Final answer
    x = 16,679.58

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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.