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Finding the Fourth Proportional to 18,671.78, 25,766.50 and 10,173.66

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Solution

The fourth proportional to 18,671.78, 25,766.50 and 10,173.66 is: 14,039.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.78 : 25,766.50 = 10,173.66 : x
  2. Step 2: Convert to fraction form
    18,671.78/25,766.50 = 10,173.66/x
  3. Step 3: Cross multiply
    18,671.78x = 25,766.50 × 10,173.66
  4. Step 4: Simplify right side
    18,671.78x = 262,139,610.39
  5. Step 5: Solve for x
    x = 262,139,610.39/18,671.78
  6. Step 6: Final answer
    x = 14,039.35

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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.