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Finding the Fourth Proportional to 18,717.61, 25,830.30 and 10,761.39

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Solution

The fourth proportional to 18,717.61, 25,830.30 and 10,761.39 is: 14,850.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,717.61 : 25,830.30 = 10,761.39 : x
  2. Step 2: Convert to fraction form
    18,717.61/25,830.30 = 10,761.39/x
  3. Step 3: Cross multiply
    18,717.61x = 25,830.30 × 10,761.39
  4. Step 4: Simplify right side
    18,717.61x = 277,969,932.12
  5. Step 5: Solve for x
    x = 277,969,932.12/18,717.61
  6. Step 6: Final answer
    x = 14,850.72

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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.