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Finding the Fourth Proportional to 18,422.43, 25,402.80 and 12,443.71

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Solution

The fourth proportional to 18,422.43, 25,402.80 and 12,443.71 is: 17,158.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,422.43 : 25,402.80 = 12,443.71 : x
  2. Step 2: Convert to fraction form
    18,422.43/25,402.80 = 12,443.71/x
  3. Step 3: Cross multiply
    18,422.43x = 25,402.80 × 12,443.71
  4. Step 4: Simplify right side
    18,422.43x = 316,105,076.39
  5. Step 5: Solve for x
    x = 316,105,076.39/18,422.43
  6. Step 6: Final answer
    x = 17,158.71

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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.