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Finding the Fourth Proportional to 18,189.71, 25,076.76 and 12,446.11

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Solution

The fourth proportional to 18,189.71, 25,076.76 and 12,446.11 is: 17,158.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,189.71 : 25,076.76 = 12,446.11 : x
  2. Step 2: Convert to fraction form
    18,189.71/25,076.76 = 12,446.11/x
  3. Step 3: Cross multiply
    18,189.71x = 25,076.76 × 12,446.11
  4. Step 4: Simplify right side
    18,189.71x = 312,108,062.03
  5. Step 5: Solve for x
    x = 312,108,062.03/18,189.71
  6. Step 6: Final answer
    x = 17,158.49

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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.